There were a lot of debate on putting a feedback based on someone's posting style and theymos forbade it couple of times IIRC.
Last message from theymos
Some people were talking about neg-trusting spammers for spamming. This is not appropriate; report the posts, and if that doesn't seem to be working well, come to Meta with specific examples and suggestions.
There's no point of red tagging someone for spam posts.
From
this thread,
asche tagged some users with this message-
Spamming bounties with 4 accounts
Brief of that thread-
These accounts belong to same person. He is participating in seperate bounties, no bounty cheating found. asche tagged them for spamming bounties.
Can it be an appropriate reason for red tagging someone? I have posted on that thread but asche didn't reply. Hence, I have created this thread.