To answer the question in the title you don't get anyone banned, if you have an issue with another member then report it and the mods will look at it and take the appropriate action.
On the PM point member's should be asking any questions they have on the open forum and not by PM, the message facility is restricted for that very reason and anyone found misusing it will have the capability to send and receive messages removed.
Review count does not show under the name on any PM, only on the main forum, with the exception of a few who have posted reviews but no numbers show due to a glitch in the system.