I have been doing my best to unsubscribe myself from newsletters lately, but sometimes things don't have unsub links on them or their unsubscribe processes are so ridiculous that I don't actually have the time to be bothered. Occasionally I click on the Report Spam button in Gmail, but I do this only when I'm sure it is spam otherwise it seems unfair to try to blacklist someone as spam for the entire Gmail world.
What I really want is an easy way to block senders/messages. I know that I can set up a filter, but this is overly complicated. I just want a nice little button that takes the action to add the sender to my blocked list and delete the message. Easy.