Heyo and thanks for the comment :)
Yes, writing your own stuff would end turning the card very scratched after a few iterations (you know, erasers), giving it a worn out look. We thought it was a problem, but it's both hitting an additional requirement of the contest (damaging the card) and it fits more the theme of the game. Nice idea!
As per catching the rebels, that would require another rule... We will think about it for sure :)
Thanks again for the suggestions!