you won't really find an alliance that lets you raid without any sort of permission. TSCE will let you as long as the target is unaligned, innactive (and doesn't have anything about being active in their bio) and that you inform us first so we know how you're doing. we'll even help if you get attacked by any friends of the guy you attack. but you must accept their peace if they become active
check us out
http://z6.invisionfree.com/TSCE/index.php?act=idx