I hope it happens soon
cause i reckon 90% or more of the email traffic on the net is "crap spam" which will eventually lead to a much more sophisticated and expensive solution to the problem being required.
there is/was some talk of introducing a charge of (say) 1 cent per every email sent which would negate the next to nothing cost of these bulk mail outs
BUT again - how do you control the complexity and expense of implementing such a system
just another example of the few in this world (use all the expletives and descriptions you choose) that spoil it for the rest of us.
bring back the guillotine I say