I have tons and tons of posters, and most of them are fairly large. It feels like I spend half of my time putting them back up after they fall, though. I have tried multiple brands of tape, which didn't work, and recently I decided to try that blue tack stuff. Bad idea! It stained my posters and my walls, ripped paint off of the walls, and ruined my massive John Lennon poster completely. The only thing I haven't tried is thumb tacks, and I would rather not use them (holes in the walls, and holes in the posters...), but i am willing to if it comes down to it. So how do you guys posters from falling?