Abused you say? So could your buffs to a much more extreme extent. Think of a hacker bypassing hackshield. Think of the godlike mode anyone could toggle on with a few variable changes in cheat engine? No. I do not support buffs. I support good old safe zone entrances. Where guilds and players will qq and taunt each other until they have a big enough force to rush out and zerg kill the rest of the spawn campers.
Its called good old player v. player. Get used to it and accept it. It is the only viable option for this situation.
So whats stopping people from setting up a siege line right outside the safe zone? You dont fix the problem you just moved the problem a couple feet over.