At OSCON this year, I’m going to be giving a talk about "antifeatures." Antifeatures are a way to describe a particular practice made possible by locked down technologies. Antifeatures, as I describe them, are functionality (i.e., "features) that a technology developer will charge users not to include. You can read my short article on the topic published in the FSF bulletin in 2007 for a series of examples and a more in-depth description.
One thing I want to do is put together as large a collection of these antifeatures as possible before the talk. Please read the article if you haven’t already and send me examples of other antifeatures either as a comment or in email to email@example.com. Credit and my deep gratitude will be given to anybody who sends me something. A prize in the form of a real Dutch flessenlikker will given to the best example I get.