I'm normally all for things being free of charge - but I'd be quite happy if they could come up with some system by which there was a nominal charge for sending emails, say a penny or a couple of pence. These scams work on the basis the if you send an enormous number out some naive is going to respond, and doing that is dependant on a system in which sending out that enormous number doesn't involve any cost.

The other day I had my computer in for repairs for half a week. When I opened up my email I found there were about 750 emails there, and only two of them were real ones. Mailwasher means I can dump them without reading them without too much trouble, but it's a nuisance - and there's always the risk I'll dump and blacklist something from a real person whose name I didn't recognise.