This is quite a good solution. It reminds me of public transport in some European countries. Yes, you can get on board without a ticket. But there will be a guard who will be on board maybe 1 in 10 times and the fines are substantial.

The problem is you can't really issue substantial fines in this instance. I suppose you could pay less for the first few runs where verification is more likely.

I really want this to succeed, and I think these problems can be overcome.