It's completely logical that if a tap is a zero-length swipe, a whack is a high force shake. Also, sarcasm is negative valued sincerity.

All machines I use run Linux, both at home and work. But I still have a dedicated $1000 machine with a $200 Windows license I start a few times a week and play the ~160 games I have in my Steam Library. I don't know of any Linux users over the age of twenty-something (e.g. has a job) that is hostile to non-free software if there is no free-software alternative, as is the case with games.

If you're using KDE, "Klipper", the clipboard manager can do this for you automatically.

Then you are not paying attention to the HTML5 development. We're into the third generation of webcam API's, the first being over three years old now. http://www.html5rocks.com/en/tutorials/getusermedia/intro/