When, in the process of stalking one on Facebook, the discovery that the said stalkee is tagged in virtually no real pictures that are actually of themselves.
"Dude, your girlfriend is such a stalk block, man, I was hoping to see what she looked like"
When someone uses high privacy settings on Facebook so that you can't see any of their pictures unless you friend them.
Person 1: "Did you hear John got a new girlfriend?"
Person 2: "No way! I'm going to go stalk her Facebook right now."
Person 1: "You can't see anything; I've already tried."
Person 2: "What a stalk blocker."
An attempt by a person or organization to convince people to reduce the amount of information they display on their online profiles.
I can't believe CNN did an expose on people's privacy being compromised online, now I can't find half my Facebook friends' cell numbers or addresses! CNN is totally stalk blocking me!