I know this is an old post, I'm a new member, but whatever.
I used to spawn camp a lot with c4 and rpg on maps like Sinjar, Tell, Vertically, etc.
I have moved away from this now since I see no "skill" or honor in doing so. I also do not wish to be know as that cancerous spawn camper.
Admins like GMO do a great job preventing spawn kills, he will kick/ban any who does it over 1 time.
I also actively discourage spawn camping and often guard our spawn (siege A insurgent spawn) when I know players who love to spawn camp are on the opposite team.
I think insurgency has much more to offer in terms of gunplay and explosives, but spawncamping is a cheap resort to "win" a game. You also feel real accomplishment if you take objectives through pure skilled gameplay and strategics.
If Xtremidiots is recruiting for more admins I will be happy to volunteer to discourage such spawnkilling/exploits