The first move is to strictly prohibit it. Put up a notice and tell them that advertisements are not allowed on the fence. The second trick is to persist and clear. There is a rule that if the ground is clean and tidy, then everyone will be embarrassed to throw garbage on the ground, but if there is already a piece of paper scraps on the ground that has not been cleaned, it will soon be filled with garbage by later people. Everyone will think: it's not a big mistake for me to throw more if it's not clean.

Don't use tearing, hair dryer blowing, nail digging and so on to remove sticky paper advertisements, which is too inefficient. It is best to use spatula+gasoline. If you can sharpen a knife, the sharper the blade, the better. When the paper is removed but the residual glue still sticks to the iron gate/wooden door/stone wall, apply a little gasoline to soften it. After softening, don't wipe it with paper towels. Scrape it with a knife, clean the blade with a paper towel and scrape it again. This method is thorough and fast.