Is it bad to send an LWN Subscriber link to a large number of people? Will they get upset? They mention that they'll remove the feature if it gets abused.
"Where is it appropriate to post a subscriber link?
Almost anywhere. Private mail, messages to project mailing lists, and blog entries are all appropriate. As long as people do not use subscriber links as a way to defeat our attempts to gain subscribers, we are happy to see them shared."