This could be open to interpretation... What if a member makes a general comment about a renowned Barebacker (no one in particular) for instance: e.g. "she's probably riddled with [insert]" would this result in a banning?... Just so everyone is clear on the matter @daviemac... 
The rules state STI allegations are not allowed, so if you name an escort (whether she barebacks or not) and make a suggestion she has an STI it will result in a ban. This has been the case long before any mods were introduced. Making a general comment about barebackers, with no names mentioned, is not accusing an individual.
Following reports, I deleted 3 such posts from this region yesterday and banned 2 members. The first I gave the benefit of the doubt to and just deleted his post, he was banned when he posted the same again. The second only joined to make the same accusation.
I posted this in the hope it would deter others from joining and doing it again.

Edit
If you said "xxx is a barebacker, she could have anything" that is an observation, naming an STI is an allegation.