I gotta say, it sucks when people start editing your work you submitted to other websites first.
You gotta re-submit everything to every site you sign up for.
I guess the truth is valid. If you don't want people messing with your work, like...if you don't mind seeing it being altered and them claiming it for themselves...you shouldn't submit everything you do online.
Remember...Don't submit everything you do online.
But if you are, try Newgrounds.