Time for a game of Good Idea, Bad Idea

Good Idea:
Finding some code that depends on a specific type of machine and rewriting it to work on any type of machine.

Bad Idea:
Changing code that works on any machine so that it works only on one kind of machine.

Very Bad Idea:
And that kind of machine is one that we don't ship software on.

Extremely Bad Idea:
Doing this to Dave's code.

Yep... someone did this to my code over the past week and checked those changes back into the main tree everyone uses. Now, instead of doing useful work, I'm stuck trying to clean up their mess.