Chrismuth

I would suggest all COD4 admin set up an alias and as the complaints peak - as they do every few months or so - you all go in game undercover to ban spawn campers as part of a planned "spawn camper raid." Get together in TS or in a COD4 Admin forum here at the web site (you don't have one, but you should have one) and plan it out. 
 
You might pick a weekend or any period of several days, where you assign "shifts" so that over this raid period, there is always an admin in game undercover. As you find spawn campers, you ban them - XI member or guest - and let them come in here and explain themselves. Word will get around that the admin are doing this occasionally and that in itself will help cut down on the practice, because they'll never know when a "raid" is occurring.
 
??