*facepalm* thats really gona haunt meh forever, and all i did was make a 2nd floor to my house and i banned cuz some guy thought id be funny to switch the 2 sign posts for his and my house and since all teh houses were the same i thought it was mine, but if u dont let people in cuz of 1 ban, ur a idiot, id be suprised if u ever had more then 5 people on :L

If you got banned wrongly on the other server then you should try to repeal the ban there, most servers that are serious about catching griefers should have some sort of block logging plugin. If it hasn't been to long the edits should still be in there database, you would have to point out the sign that was changed to the admin.

However, I can't really trust what you are saying is true so the answer is still no on the whitelisting.