Just ignore them.
If you are Glass, you're Glass.
If you admit to that, then fine. It wouldn't be the first time Glass has returned, and the same course as usual will occur.
If you say you aren't Glass, then there's no way for us to prove you are. So for all intents and purposes, we might as well assume you aren't Glass. There's no point in being rude to someone based on an ill-founded suspicion.
It's simple fear-mongering and finger-pointing, is all.
Anytime a controversial member is banned and returns, people suddenly get extreme random paranoia and suddenly turn to witch-hunting.
It's like Plaz all over again.