500 teenagers raid beach to mug beachgoers

From BBC News - Portugal youths in beach rampage:

Some 500 youths, mainly teenagers, have raided a popular beach near Lisbon spreading panic among beachgoers and mugging a large number of people.

[..]

Policemen in riot gear were confronted by gangs and struggled to restore calm, making four arrests.

The attackers are believed to come from some of the capital’s poorest suburbs.

“Small groups of youngsters aged 12 to 20 assembled and robbed en masse those they found on the beach,” a local cafe owner, Helder Gabriel, told AFP news agency.

I repeat: 500 youths raid a beach. Policemen in riot gear arrest 4.

Oh my.

I wonder what is going to be next? I’m guessing that 500 semi-organized people can riot pretty much anything in most western cities, and get away with it. It would probably work if 500 geeks would gather to raid a MediaMarkt store to replenish their gear stocks.