A FOIA request - or series of them to each police ‘service’ - should highlight how many people each force have fined or arrested or prosecuted for stickering.
Fwiw, my local police, the Met, don’t bother investigating burglaries, thefts, threats to kill, frauds of less than £100,000, attempted violent entry while householders are home and numerous other seemingly (to rational, sane people) more serious crimes.
I’d be very very surprised - and incredibly concerned and perplexed - if they were arresting men for applying stickers. It’d be illuminating to see if they’ve arrested any women....