If you want it, keep it. If you don't want it, toss it. Junk snailmail or junk email, makes no difference. The price of any communications system is commercial use. To elimate commercial use is to either eliminate the communications system or eliminate the capitalism that drives the commercial use of it.
I'll keep the email system and the capitalism, myself.
If you want it, keep it. If you don't want it, toss it. Junk snailmail or junk email, makes no difference. The price of any communications system is commercial use. How someone who's smart enough to reject the lines "It's all about sex" and "This is a Vast Right-Wing Conspiracy[tm] plot" could also be dumb enough to accept the lines "Spam complaints come from anti-commerce e-hippies" and "This is free speach[sic]" passeth all understanding.
The issue has nothing to do with commerce. It has to do with theft of services (specifically, bandwidth).