This would/could cause a ton of lag, but it would be kinda fun.
The creep isn't fast at all.
http://www.mediafire.com/file/i5tydjzdmmx/Weapon_NewCreepKill.zipRky posted this, it contains several new anti-creep weapons including a shotgun, SMG, and an "explosive". I don't know if it's a grenade or what though.