I've spoken in PM to three separate guys who have had negative experiences... usually about "over-sharing" or miscommunication - and he gets - intense - or angry and the interaction becomes unprofessional. And, to be fair, a couple of other guys said he was good and didn't have an issue.
I've been down the road with an escort where things got - unprofessional and too needy - and just didn't want to risk it again.