I just finished coding up the edit/del feature. You can customize the time to whatever you want (or disable it to prevent regular user editing). Mods/admins have the right to edit/delete all feedback.
I made all the necessary changes to the DB & code, there was a lot of re-write to support the editing & permissions and such, I'm not sure if I will consolidate it before this next release or not. (I try to write functions whenever feasable.)
Sunday I'll probably code in the usergoup permission stuff, convert some new text to phrases, and write the upgrade/install scripts. If nobody reports any bugs to me on my forum then I'll release v1.10 on Monday morning.
I think user based editing/deletion will really help out a lot and reduce those PMs from members saying "hey, I made a mistake rating this person..."
One thing I *might* change in the future is a soft/hard delete option, kinda like what you can do with threads. But I'm not really sure it's worth the effort...