These videos expose the dreadful and appalling behaviour of what the now middle aged and old people of today were like when they were youngsters:
The Mods and Rockers of 1964: https://www.youtube.com/watch?v=8E4znu82XhE
The football hooligans of the 1970s: https://www.youtube.com/watch?v=duyqm9n2t5A
The 1981 rioters: https://www.youtube.com/watch?v=FMWJXWrenm0