Drives me crazy when I see things hung up with tape on the corners like that. Not only is it bad for your wall, but it can rip the poster and covers parts of it up. Instead, take a piece of tape, roll it into a circle about the size of a nickel (sticky side facing out) and put it on the back of your poster on the corners. Problem solved.
Yes, and it doesn't leave oil marks on your poster over time - like prestik would have done.
If your poster is too heavy, rather use ducttape with the same method.
If your poster is too heavy, rather use ducttape with the same method.
2. It was a shitty plasterjob with an even worse paintjob.