Warning.
I have a few accounts on forums where they discuss barebackers. A warning was put out about a barebacker in Doncaster. I don't know who yet, but I did find out that it was one of the women that advertises it openly on AW. Even when they warn each other, they're very cagey about giving out information.
Apparently she posted photos in her AW private gallery and more than one shows what appears to be some yellow vaginal discharge. Although not conclusive proof, even the NHS website agrees that yellow discharge generally means one thing - she has an STI. Worse... she possibly doesn't know given that she posted the photos so could be happily passing it on.
I've not seen the photos, but several people on the group have and they were all in agreement.