Is this really true? Can you point out who is this user that luckily removed the red tag by the admin? It might I missed this topic I guess.
Check this topic, interiawp objected to allegations of proven scam gave tags to some users supporting flags for it, it was complained by everyone tagged by it and mod removed all those tags after few days.
https://bitcointalk.org/index.php?topic=5387596.0This was what I thought and if the admin removed the inappropriate red tag a while back so how do we approach them regarding this?
Not that simple I guess, if the tag is given to any DT members and if that's valid, it shows a warning to others and it will visible to them and that's what OP got on his profile.
True, the negative tag is a warning to other users to be more careful and I think it's a legitimate thing to do.