Are there any big/leet call of duty 4 clans?

[Briamo94]

I used to play COD UO on pc and it was awesome, clans on there werent a dime a dozen like on COD4, its ridiculous there are probably a hundred thousand different "clans" and you could play alll your life and never see them again. i miss there only being a few "leet" and big clans. partly because it was dieing and partly because you could buy your own server, UO had a great clan setup, you had those that owned theyre own server and a few that just tolled the servers they liked but it seemed like everyone knew about all the other clans, are there any clans like that on COD 4? I remember in UO there were a few leet clans that people all knew about and wanted in like historians, rlx, vivid(which i was in), pugstarz and a few others now the importance of the clan is so demeaned its useless.