A blogger reporting from “Greater China” is lobbing useful info over/around/through the “Great Firewall of China”. The latest involves Friday’s 21st Anniversary of a Big Event China Wishes You Didn’t Know About at Tien’anmen Square. (Hint below)

Now Chinese Authorities had shut down Twitter, Facebook and every other major piece of the so-called Social Web before or during the 20th anniversary, but intrepid web-people, determined to make symbolic but mostly futile statements, used the “Social Locator” service Foursquare to declare that they were at Tien’anmen on Friday (whether they really were or not).

Of course, that got shut down in a hurry. Thankfully, we can still know that it got shut down, which is a victory of sorts for those who live on teenylittlesmall victories.

And for the 7 or 8 of you on the Web who don’t know what Foursquare is, here’s a visual aid from the PvP comic strip, using a fictional version of the service with a similarly ‘schoolyard game’ name, because Scott Kurtz is more afraid of the Social Web people than David Feng of Techblog86 is of the Chinese Authorities.