Most reports I saw were on couchsurfing.

As The Historian noted, I also remember a report of Hans Myers making a pass at a host's wife.

Plus a couple of unwelcomed overstays.

Several reports of him showing up with no notice.

A report of him showing up smelling really bad and refusing to take a shower before dinner or even after.

Some of the best indication of his attitude was on his two rant pages. The general page has been pulled and the rants against churches has been modified to just general complaints rather than listing his specific rants against specific churches and reverends.