Moreover, I think, people posting on Flat Earth etc. should not be dealt with trust feedback. They rather deserve to be in ignore list. We already have enough scams to deal with. Check the users I have left -ve trust. Some of those scammers are not yet tagged by DT.
I'm not saying he is a scammer. I'm saying he is a nut job and should not be trusted.
You are NOT saying he is a scammer. But, the tool you have used is meant to identify scammers.
Its like police arrests you and keep you in lock up, saying...
"We're not saying he's a drug lord. But he's a Bitcoiner. So, he can be one."
But it's up to you. If you don't trust the guy, you're well within your rights to give him a neg. I just think it's pretty harsh.
Here is the fallacy. A random guy on BitcoinTalk can do whatever with his trust feedback. But, when it's from a DT member, it's NOT personal anymore. DT feedback represents forum trust. So, it must be rational & justified.