Umm...let me think about that, NO!!!
There are better ways of stopping spam like aggressively shutting down the domains that send out the spam and creating permanent list of people banned from owning domains for reasons of spamming.
It also might not hurt to have a few high profile arrest made for spamming. People might think twice if they knew they might be spending 10 years in a federal pen getting bent over by Bubba every night, lol.