If a people can abuse merit system, s/he is not trustworthy in my eyes and there is no problem with tagging him/her. If you think, someone is abusing merit, why don't you tag him?
Although admin reply to bones261 but this is applicable for all. Not only for bones261, this is just example. Admin already mentioned, if someone not involved with abuse like buy sale merit then we shouldn't tag them. Otherwise it should not consider merit abuse according to theymos. For us we could tag that merit abuser not trustworthy, but if a DT want to tag then there should be strong evidence. DT just can't tag someone for that he don't trust. He is the responsible person and red tag will reflect on tagged profile. Since admin agree to spread merit over forum, then I don't think DT need to tag them also (if not involved with merit sales).
It's really not good that someone earning merit by doing nothing and someone not earning even working hard. That's the main problem. Intention of merit to build decent forum, but people just think intention is rank up. So they are abusing it.
@LoyceV post edited.