Anyone have some good tricks to getting the gray stickers off the Monster's frame without leaving a bunch of sticking crap/material or scatching the frame all up?

Heat with hair dryer ....peel with fingernail then if there is any residue use Acrysol  to remove

http://www.kenteurope.com/uk/shop/viewfamily.php?viewfamily=5168&sectionid=&type=Auto

We've got a 'how-to' in our Tutorials...

http://www.ducatimonsterforum.org/index.php?topic=52745.0

thanks and sorry, shoulda did a search! 

You might want to save them on some wax paper or adhesive label backing paper just in case you want to sell the bike on to a state which would like to see the compliance, etc. Some of that data is germane to you as well.

+1 on keeping them or possibly re-positioning them out of sight.

Sometimes, legal entities need to see them in order to register in other states or what-have-you.

I wish I still had mine.  (BTW, those can't be re-printed by Ducati....  ever so no getting another set)

My sticker cracked n pretty much fell apart long time ago.  All that is left is the goo and I am ok with it being there, she ain't a show bike.

Stuck mine to the bottom of the seat. Good thing too. I had to show them in CA to register there.
Don't toss 'em!