Fire bats suck???lol...no they don't....
U should try this sometime...drop 7 firebat and 1 medic in a guy's mineral line...stim, and watch eveything blow up...only works if he has no defense of course...works well!!!Even though he does look weird...he's wearing all this flammable stuff on his back and he is smoking a cigaratte.....
The worst unit in SC...probably is the infested terran....in over 200 games i've played, i've only seen it used about 5 or 6 times...very rare...even build, they get killed so fast by ranged units before it even gets there....only good thing is drop them, or use darkswarm with them...