People like to play with there friends.
A little while back... end of 2001.. in between UT1 CTF leagues here in Aus.  I made a 
Super Happy Fun Comp ... with Dom (tm)
(I asked for a title to the league ... this is what they gave me 

 )
Concept of the comp was simple.
Signup to a thread if you want to have some FUN games.  Captains were allocated.  Draft was done forum style.  All nice and simple.
Was about 6 teams of 8 people?  Each had to decide on a clan name / tag to use.   
Team 1, #1 :p 
"That's why we're #1"
No-one was excluded from participating.  Even the lamers.  Teams would select a dom dm or CTF map.  No double ups.  If one chose a dm map - other team could pick a ctf or dom map.  We wanted DOm in at least ONE comp... sorta..
Captains picked there friends so the matches weren't so even... but fun.  For a little while. 
(even though draft rule was - can't select clanmate first up.)
People moved quickly back to there ordinary clans after a few rounds... and the fun comp ended.
Yay...