The only thing it could potentially be would be "posts" - however, he hasn't posted ANY posts on his profile, so surely it can't be that either.
The only thing he's done has been to "+1" articles he publishes from his own site.
So my question - could "+1"ing something (for lack of a better way of saying it) be against Google's TOS? Because that just seems very heavy handed. And if so, does that mean in order to remove the suspension, he must "un-+1" those articles?
Seems incredibly counter-intuitive Google......