I used to role play online using photos of myself.
Why would you reveal so much of your identity?
So my roleplaying would be more authentic
Any time a picture is shared digitally on social media, you should assume that it could get out of your control. It can be incredibly difficult to delete content once it's been posted online.
What do you mean?
You don't know these people. Photos can be manipulated in all kinds of ways, both good and nefarious. You should at least take the most minimum steps to protect your privacy and use avatars.