We can create awareness by making posters in which the correct reason for y not doing that thing should be written with how can be stop it frm occurring. And doing rallies so that everyone has a idea about it
Also if we see someone doing such things we can personally go to them and tell them why they should not do that.. the reasons can be like- monuments are for recreational purpose, so we should not destroy their beauty also every monument is a part of INDIA.. then why we should reduce the beauty of our own country..and should also tell them to show some respect regarding their Motherland and all its belongings... I hope it helps!