Franck Stylyroper-Bossi Working for free (for a charity for example) is depriving a Thai of work thus it's considered working. Busking and even selling illegal narcotics on the street can get you arrested for no WP - and other charges of course.
Or a non imm O on marriage - yeah, some are that desperate. But giving away large sums of money just to save a little inconvenience is all well and good but don't expect a refund if that relationship with your sulky, moody, whinging, scrounging hooker goes tits up after a couple of months!