Flairs were just a pointless addition to the site as it was. They had a large backlash when they were introduced and any criticisms that they garnered were heavily censored by the mods and admins. People also abused the "Off-Topic" flair to the point whole boards were flooded with nothing else besides them so they had to remove it entirely and hid all the topics that utilized said flair. Most of it is now just silenced as people don't have the energy to care or continuously complain about it anymore. But it did show a pretty clear picture of things all things considered.
With regard to this suggestion? I don't necessarily see it as a bad one, but as stated, flairs would actually need to be more enforced than they currently are and the chances for that happening are pretty slim.