Incidentally, this was the first time that I have ever been actively heckled during a talk. Despite conducting a rather loud personal conversation at the back of the hall during most of my talk, then giving me a massive thumbs-down gesture as I wrapped up, Richard Stallman decided he had heard enough and proceeded to take over the Q&A session for a bit of a dyspeptic rant about the 'iBad' and how Apple was subjugating children everywhere for their own evil ends.
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The RMS anecdote is worth calling out:
Incidentally, this was the first time that I have ever been actively heckled during a talk. Despite conducting a rather loud personal conversation at the back of the hall during most of my talk, then giving me a massive thumbs-down gesture as I wrapped up, Richard Stallman decided he had heard enough and proceeded to take over the Q&A session for a bit of a dyspeptic rant about the 'iBad' and how Apple was subjugating children everywhere for their own evil ends.