I just read the policy-change about infection and went Googling to find out more about it. I'm worried now, since I do not want to get banned. I haven't really been able to work out what infection is exactly and how you get infected. The first step seems to be an invite to a lobby. But how do I recognise an infected lobby? Can I get banned just for being in such a lobby? In other words: can I still safely accept game-invites?