Don't touch them. Welt pockets can't be moved, even with a virgin sacrifice. Patch pockets (like on jeans) can be un-stitched and resewn but you'll be able to see where they used to be.
Lastly, on patching jeans. It can be done! Take a look at www.denimtherapy.com . You mail your beloved jeans to their workshop in New York and they magically and invisibly darn you jeans so you aren't walking around with an awkward hole or patch near your crotch.