fire with fire exactly. or emp's but sometimes that wont even stop me after one kill i know where the bullets are going. i used to only use the reflex until i found out how easy it was with a TF... but most classes i dont use any attachments other than something to imrpove accuracy or FMJ for core gaming.
The aim is no different to any other sight - it's just easier to track the movement of a big red diamond. Damage is no different either.
If everyone used cold blooded then most people would stop using TF.
As one or two mentioned you can sometimes see the tip of a diamond before someone emerges from behind a wall or through a doorway but you've got to be aiming there in the first place, so what difference does that really make?
People should be free to use whatever they want as long as they're not hacking and not have to get abusive messages/comments for doing well with it!
Anyway seen as TF is countered with CB, where is the counter against people using laser sight who never need to ADS again?? Everything is overpowered if people use it well against you and don't/can't counter it!