I have my main's movement left at the WSAD. Then I have my alt set to the arrows and to Shift WSAD.

When I hold Shift WSAD all my toons move.

I personally don't put anything on my "Do not pass" list. At least, not yet.

I like being able to say the exact same things at the same time to confuse people or emote. It's funny.

I just unbind / rebind things to some kind of cryptic combination if it's something I don't want to accidentally do.