LOL..the tf does not make it easier. You still have to actually aim at them and be precise. It is no more easier than the dual band or the multimillimeter scanner. And there is a very easy counter for it called cold blooded. Just some people refuse to change their loadout because they feel they should not have to.
Target finder or poor mans aim bot is pretty easy to counter by default as most are terrible players in the first place .
Simply flank them chuck a EMP and throw a c.axe into their face job done ! Then give them a good tea bagging ! Then rinse and repeat lol I've came across whole teams using the poor mans aim bot lol .... Pretty sad really !