I think it will prove that you are still the same owner and I thought it would be a reasonable proof for everyone.
Don't worry, no one can tag you if you are completely innocent. So after you managed to prove it then your problem I think is solved.
I think the same, I don't want to tag an innocent account and _BlackStar also doesn't want to ruin the reputation of an account that was not actually sold. The only reason this tread is here and the suspicions are there, is because there is a lot of shady things in this forum that the mods don't care about or don't have the time and energy to sort out. So if you can sign a message or send an specific amount for example 0.01337 ETH I think everyone will be happy.