Or its like me sending you a letter in the mail and you throwing it out...?

Pretty sure cleaning up after thrown eggs is significantly more work, and more public than hitting the spam button

Relax, I'm not defending their actions, I'm explaining that you shouldn't feel bad about pressing "SPAM" in that case.

There has been a subtle pr campaign to convince people you should press "unsubscribe" on any unwanted mail instead of hitting SPAM, lest you ruin it for everybody. I'm saying: don't believe the hype. In this case, just press SPAM.