Cash......this is why people do not want digital currency with taxation run-amok these days.
I could care less if someone misses out on playing, cash only or other non directly traceable means of wagering. Players demanding digital borrowing/banking at the risk of the hosts tax liability is rather much in my opinion. All they have to do is stop at a bank machine....I live in a town with several banks, I see no excuse at all to not use cash. If safety is the issue, have everyone give you $ in advance and paid the next day with receipts. Otherwise I'd suggest charging a "fee"for use of the washroom for example that will offset your additional taxes....like 35%, just in case.