is it a bad idea to setup a masternode on windows 7 ?
with unnecesasary services turned off and firewall + antivirus installed.
Please please please do it. You will have given me 1000 DRK within 2 weeks of you launching it. I'm not even a little bit joking. The number of attack vectors I would have is unreal. Not as bad as say running a MN on win xp (god forbid...), but still.
So basically no one should even run their standard wallets on windows 7?
So much for going mainstream.

He's talking nonsense and pretending like he knows a lot, while he actually does not. The idea is not bad or good. You would have to work hard and set it up correctly so that you won't get attacked IMO. There is no way for him to get 1000 DRK within 2 weeks even if he hacked you.