I think the anti bot function their implementing is making the other stuff get considered as 3rd party programs.
When I tried using the print screen function is disconnected me and froze my character.
Not really sure if it happens to other people but it happened already twice, trying to get pictures of bots which is ironic.
Using a 3rd party program will get you quarantined, not frozen. I have not heard of anyone getting frozen because of taking a screenshot as well, you might have gotten fps drops when taking screenshots and it lead to you disconnecting. When you relog too fast it happens that your character gets frozen. My Character is Frozen with a Timer!