Stop pushing delete-simply un-subscribe. Although a topic may have been of interest to you four years ago, when you were snowed in with nothing more to do but surf the web for tips on knitting your dog a tail warmer, you may have since grown as a person, and evolved. Maybe you moved on to Paper Mache', or thumb wrestling.
You complain each time you open your email box and there are 23 emails filled with information on where to buy yarn by the pallet, and links to patterns for doggie mittens. Habitually, you grumble under your breath something about spam, and hit delete, delete, delete. If you know you subscribed to the site, and no longer require the information, simply open the email and un-subscribe. Granted, this isn't always easy. Sometimes the site owner of that knitting circle will harass you with a pop up or two, trying to lure you back.
Sure, they'll tempt you. They'll remind you
Angie Hodges, GVA Angie Assist Virtual Purchasing and Business Support http://www.angieassist.net