but eliminating those will not solve the spam problem.
spam is a chronic disease for which there is no magic bullet.
like most chronic diseases, Internet or otherwise, it can be mitigated
and controlled but not cured.
As long as people are aiming at a cure, it will be easy to put forward
absurd solutions. And solutions that break things.
and if you think you are big enough, you can try to outsource the
problem and dump it on the rest of the network
randy