Pronunciation: Dan Sameelyan Rool Any policy or technology used by a website or other organization designed to prevent users from changing information previously entered (typically personal information).

So named for Dan Samiljan, who as a piece of web-based performance art changed his listed birthday to the current date for 43 days in a row on facebook, before facebook administrators caught on and implemented restrictions requiring him and anyone else from that point on to explain why they want to change their birthday.
"After my girlfriend threw a flipped her wig at me for posting the wrong anniversary date, I tried to go back and change it. Apparently the site has got some kind of Dan Samiljan rule though, and it wouldn't let me change it.
by Mak Leto February 04, 2010

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