I agree with this part. I don't want a good active group (with potential) get deleted because the creator wants to move on for (good/stupid) reason.
Great catch Frozen... I've definitely had some idiot users in the past who would've loved to create havoc for me. So having group deletes as a moderated function would be great....
Or... even better... just have the groups go into a Recycle Bin... so then if anyone complains, an admin could easily be put back... then change the 'admin' of the group to someone better.