No offense, but that actually can sound condescending and makes you look a bit childish. No other user says they are "here for good", as it is not necessary, so I kindly ask that you remove that from your user page. Thank you.
I suggest you better hold yourself to revert the edit from that vandal. Wait until everything's fine (the condition where the vandal is blocked) or if you keep revert it, you'll be the suspect of edit war. Thank you.