Iv'e been reading this thread, but have not commented till now.
I think the mods team have more to control than PMs, i think it's a matter of if you would say it on the phone, send it in an email, or even put it in the a letter. then you have nothing to worry about.
We could all get paranoid about being spied on, Your phone calls, text's, emails, even you IP address is kept on file.
I personally would like to know that it is possible to track down terrorists, pedofiles, etc, The technology is there but for a private message it is as private on this site as it is on your phone, email, etc.
If you are slagging off a member or even the mods team, remember only the person you sent the message to has seen it.
If you are up to something illegal, then don't use your phone, email, letters, or PMs on a forum.
The software on this forum has a language censor built in. if you are still not sure then check out the link at the bottom of the forum. powered by smf, you will find lot's of answers there, and also appreciate how hard it is to run a forum.
This is just my opinion , and i welcome any criticism.
Enjoy Safe and secure PHO.
Fred.