No user PM access

I would agree that could be an improvement if implemented to be default settings, the trust tier filters can be too much such that people are turned away from communicating through an unfamiliar system.

A lot of sites have a contact form where people can write in a note without needing to create an account, that seems like potentially the best way to improve ease of people being able to contact site staff. When setting up a site there is the “contact us” link which can either be an e-mail address or page address of a contact form.

Slightly more aggressive method is some sites have an automatic chat bubble that opens with bot saying “welcome, how can we help you?” Those can also be annoying but then much easier for new people to communicate through that without even needing to fill out a form or agree to terms and conditions to create an account.