The person's of interest will be those who coins which are not showing up in their database as having paid the tax.

You going to Wifi won't stop them from drag-netting a person of interest.

A 1000 high profile prosecutions of those who don't comply, will scare the rest into complying.

I don't know why you 5 year olds can't grasp that they don't need to go after every single person, because most people would rather comply than be ass raped in jail.