Everyone does the same thing. You can't even pretend that you're too righteous to noobstomp with a KT. The only people that can't noobstomp with KTs are the noobs.
No they don't. And of course I would noobstomp with a KT.
I've been also risking my vet in one sided games with newbie teammates. I won't risk a KT if it costs 15 pp however.
And why are heavy tanks special? If they are too cost effective you can increase their cost. Why do they need to cost so many pp?