I'd like to suggest something that I have been wanting to happen; users being able to edit / delete their own scribbles. This would help out with users who post accidental scribbles, scribbles with typos(that they'd like to fix), etc.

I think if you could edit / delete your own scribbles, it'd be much easier to fix things up a bit. If a user accidentally double scribbles, this would help too.(so that they could delete one of them) It would also help if the user accidentally made a typo, so they wouldn't just have to correct it in another scribble.