I would disagree. Phishing spam exists in an effort to steal or otherwise harm the recipients who are tricked into responding. Prescription drug spam can tempt those who may have a moment of weakness into breaking the law, and they could possibly purchase counterfeit goods that can directly harm the person. Money is spent by companies who have to either self maintain or pay a service to maintain a spam filter. I occasionally miss important emails that are incorrectly filtered as spam, one was an offer for a side job that would have paid me real money.

Spam is harmful, plain and simple.