That's why, even thoughit is possible to buy a hurricane-damaged boat for 10 cents on the dollar from a Captain Bob hanging out at a marina, we advise against it.
Multiple keyboard actuations are now possible (shift plus a letter, for example), though it's not perfect -- things start to get flaky as your second press gets physically close to your first one, which makes some sense considering that the switches are placed at the screen's four corners.