If I see a toon that has fallen asleep on the street (not the best place to leave your toon, but real life happens) I will push the helpless toon onto the sidewalk. If they are close to a playground tunnel, I'll try to push them that way instead so they can't be pushed into battle.
In the future, if you want to do something else for a few minutes and don't feel like logging out of TT, I suggest falling asleep at your estate, in Toon HQ, the gag shop - anywhere that is safe from cogs.
By falling asleep on the sidewalks, you are giving mean toons the opportunity to grief you. Don't give them the invitation or satisfaction of creating trouble for you. We can't make everyone else make the right choices, but we can make our own good choices.