in a moment of 3am insanity, i started peeling the security stickers off all my blockbuster previous rentals. I did the first one by just starting peeling carefully and it worked ok. On the next one, I ran it under hottish water and it came off much easier. So I started doing the rest, sticking them in the sink to soak. This was probably a bad idea cuz on the next one "Thirteen Days" the silkscreen started peeling off with the label but I was too far on the label to go back, so I peeled it the rest of the way off. However, the disc seems to play fine. The rest I didn't presoak and was more careful and it worked ok. Another anomaly was my Hanibal discs which had stickers intended for Playstation games instead of movies, and those have much better glue, you can't get them off clean, don't even try.
Anyhow, now all my discs (cept the hannibal ones) are stickerless and all play fine. I'm not sure if I would use the water method again since the water got in between the layers near the hub and I went through alot of trouble drying it out. It doesn't seem to penetrate beyond the inner part of the hub since the layers are sealed together with the ring about 1cm in from the center. A hair dryer might work ok but you'd need two people, one to hold the dryer and another to peel.
But, my fingers were raw and sore the next day.. 🙂