There is very little anyone can do to counteract squatting. I have never seen an actual solution to this, as upping the comment count assumes that there still won't be squatters. I have seen squatters at games with a much stricter AC.

A reward system might work, but I can't think of how to work it in to the current way Animus runs. Characters keep their powers, and regains are tied to events, so there's little left to earn, IMO.