What are the disadvantages of distributing leaflets for promotion?

First of all, it is not environmentally friendly!

Secondly, it causes interference to passers-by. There have been real accidents everywhere in the streets of Beijing: because there are too many people passing by (most people don't want to receive leaflets), the flyers are thrown to passers-by in a hurry, perhaps too hard. As a result, a child's eye was scratched by a corner of the leaflet, and he called 120 for first aid.

Finally, modernity is a fast-paced society, and many things are changing at any time. That is to say: the newly printed leaflet probably needs to be updated, or the expression of words and pictures needs to be updated, but the paper is illegally changed!