I'm going to post a picture of Vinnie that I did not take:
Yes, he does look a little feminine. Yes, insecure people online are making stupid jokes about him being transgender.
If he is transitioning to female, so what? It's his life, not yours. I can assure you that most Kiss fans were there did not care. We want to see Vinnie as a changed person of course-his behavior in the past was sometimes problematic, but no one there cared about his gender. At all. If it was a surprise to the people there, it wasn't gossiped about. Perhaps in private they talked about, but I didn't hear anyone making jokes or comments.
Kiss fans are often viewed as the bastard child of music fans, and there is some truth to that. Some Kiss fans only talk about Kiss-but the majority of us are normal fans who have broad tastes in music and don't care about the sexuality or gender of any of the band members.