That's the stupidest thing I've heard of in quite a while.
It's the same 'logic' as stop and search statistics in the States, where they have metrics about stopping 10 white motorists, 10 black motorists and 10 hispanic motorists a day even if they're not doing anything remotely suspicious.
( .Yeti., Wed 23 Nov 2016, 10:31, archived)

I said it'd make you angry
It made my Dad angry too. He was sergeant of a Tactical Response team (full body armour/riot gear training, armoured mercedes van etc), tasked with driving around looking for kids doing graffiti because they'd already met their violent crime quota for that period.
( Grrrmachine the indifference engine, Wed 23 Nov 2016, 10:38, archived)