Ok, on the subject of 'fun things to do' here is something to do if you really want to screw with your spouse/sibling/friend:

1. Add an event. Add a hotkey trigger for the D key.
2. Add an message action. For the message, just enter an 'f'. Click the macro box.

Now, d and f will both type f. If you want to be cool, add another event like the above but make it so typing f will type d.

Put toolfish in Stealth mode and just wait for until your target breaks his/her keyboard in frustration when they find the keys reversed.

Another variant of this is 'broken key', just don't specify the second action and the key is effectively disabled.