First being helpful, he developed into some kind of agitator, as it seems.
He is recently posting a lot of things like “3DR you have to recall Iris”, etc. and now it seems that he even opened his Iris and started to search for things he would consider a problem to start a thread about it.
He also recently started commenting in a similar way on support threads of other people, not offering help but pointing out what is in his opinion a design flaw or otherwise 3DR’s fault.
I sent him 2 friendly PMs, advising him that this is a tech support and not a community discussion forum and that he should refrain from agitating.
As this didn’t help, I sent him an official warning with a threat to terminate his account if he doesn’t stop today.