You know, Uranium - 235 you are right about alot of things in your posts but you are wrong about stereotyping your views on clans & competitive gamers in general.
You said that you never have been in a clan; obviously I can see how that reflects your opinion.

Although I can accurately recall my opinions on clans was nothing but a pool of drama, but one day I said "screw it" and signed up for the first appealing clan.
Not every clan is about using every exploit and every glitch to win a competitive match. I am a member of a BF2142/COD4 clan and your poor statements and insults to clans in general did not reflect my experience being in a clan since the day I joined up. It is true that many clans out there do not hold high the ideas of fairness, common courtsey, and respect. But that is not just clans, it's people in general. One thing that alot of people don't understand is that respect is nothing without honor.
It is normal for people to group together. It is normal for these groups to resent eachother and fight eachother. Joining a clan has its ups and downs, but for the most part it's an experience you don't know anything about until you try it. Politics, competition, new friends, new enemies, coordinated efforts, broader horizons.
From reading your posts you have an extreme black and white point of view on this subject. Although, that is nothing new, the rest of the world fight eachother because nearly everyone is posessed by a black and white prespective. It is too easy to stereotype and label something you know little or nothing about. You can sit there and speculate all day, but you will never really know until you try it for yourself. So cut the arrogant comments and look at the situiation from both points of views first before you judge them. The ability to look at a situiation from more than a single point of view is a trait that should be highly valued.
As a competitive gamer, let me tell you a little about myself.
If you are a normal human being you should enjoy winning and naturally dislike loosing. I for one love winning; I don't like loosing, but I don't hate it. The only time I hate loosing is when it's against jerks; cocky jerks, cheaters, or all of the above..
If I get stuck in a situiation where I will loose repeatedly, I will leave and find someplace easier to play. If I don't have a choice I will become frustrated, but I wont resort to pathetic name calling, glitching or other despicable acts. I prefer easy play, where I can have fun, win, but not have to output 90-100% of my concentration and skill to play. You would not believe how difficult it is to find a game fitting this criteria if you do not have a clan, or group of friends to play with.
The only times I do try my absloute best is when we are doing a scrim or w/e against another clan. Since this is a clan affair the stakes for reputation and respect are higher than ever. So obviously losses are more frustrating, and winning yields greater value than a normal pub match. True that stress takes away from the fun, and loosing a clan war is shameful, but the feeling of winning these matches with your friends and everyone cheering in union is worth it, every time.
Although, sometimes in pub matches the pubbers will put up a hard fight so I fight harder. As well as everyone else in the clan on the server at that time. It's almost like a random challenge. Dont get me wrong though, not every fight is one sided. Often larger clans will get seperated onto opposing teams during a match and be forced to fight anyways. Personally I think this is the best time to test yourself and your clan mates at the same time.
As far as server raids. I have only seen it a few times. We typically ended up fighting eachother except on someone elses laggy turf.

As far as team stacking, if I join another clans server I will naturally join up on the same team as the clan members, because I prefer to play with people who actually know how to coordinate, watch, and support eachother. Obviously over a group of people who run around doing whatever it is that un-organised people do...
I play to have fun and to win, but I won't use glitches, cheats, and exploits to win. As for my clan mates and I the only time they or I would ever exploit or glitch was on our pub when we were messing around. At this point winning doesn't even matter, as long as everyone is happy and having fun i'm game here. Still I might be a tiny bit dissapointed if my profile was damaged from all the messing around. But knowing everyone had fun outweighs that feeling by far.
Often I will smack talk and toss around worthless jokes and insults for fun, but if someone really gets worked up I will let them know I am just messing around. Or if it is not accpetable behavior in the current server I will respect their rules and obey them. Everyone that plays COD4/BF2142 or other M rated games should be grown up and should be able to have some mature fun anyways.
Sins is no expection. I prefer to play PvAI in RTS games though, I don't enjoy watching hours of work slowly fall apart by someone who knows the game inside and out.
Anyways, you shouldn't join a clan because I think good of them. You should join a clan to broaden your horizons. Then you should have the ability to see it from a second point of view so you can later compare your experience to your arrogant self-restrained point of view you once had.