They congregate outside shops and places such as McDs. They shout and swear at customers and staff. Sometimes they run in and ride their e-scooters.
This behaviour isn’t cool and big. Then when the staff of shops/McDs/whatever or police ask them to leave. They come back a few minutes later. Again not cool and big behaviour.
When I was their age 10-15, I didn’t do this nor did anyone.
I do hate people who say that youth clubs don’t exist anymore and need to return. Youth clubs when I was a teen were crap. A pool table, some other activity that can have 2-4 people and that’s it!