I am not in any doubt. I think iv4n deserves a red tag and it should stay
In that case: there's your answer! Let the DT1-voting take care of it:
With great power comes great responsibility (
source unknown). Especially when you're on DefaultTrust (or if you want to be on DefaultTrust in the future), you shouldn't (ab)use that power by leaving (negative) feedback when someone does something you don't like.
Your Sent feedback is what others use to judge your judgement.If someone on the internet is mean to you:
boo fucking hoo! Use the Ignore button, and forget about them.
If enough users disagree with your feedback, you'll drop out of DefaultTrust, but at least you leave the feedback you believe is deserved. There will never be 100% community consensus on Bitcointalk.