Is wallpaper paste not clogging the drains' pipes when I want to dispose of it? How can I ensure that I won't be clogging them if I'm buying them?

Add a lot of water to weaken it so it flows away

I use it so much and have never had a problem. Just run the tap for a while afterwards and it goes down a treat.

Man, wallpaper gunge is just the best and everyone should try it!

Many many many years ago, in the early days of videos on the WWW, a few videos showed an older gent who invited young guys over to help put up wallpaper. He kept the paste in a large tub and "accidentally" knocked the guys in, covering them completely. Obscure but excellent films!