TF2: the Natascha when it was overpowered
BFBC2: the Carl Gustav
countless others I can't recall, if a weapon/ability/etc is in game, it's there for a reason, to use at your discretion. I hate when someone claims it's a noob tactic. Now I'll admit it feels a bit tasteless especially when dev's may even say it's OP and needs to be fixed, but untill it's fixed it's still in game. they haven't removed it from play and swatted you with a bit of newspaper for using it. If they don't remove it from play it's fair game...that's not to say I always go with what's best out there, but even if it's a "noob" tatic/weapon/etc as long as it's there your allowed to use it.....people just call anything that can kill them a noob tactic, even if it's a proper way to use said tactic....