@mwichary I loved your point about how confirmation dialogs for closing/destructive actions are sort of a molly guard too!

I'm also thinking about the super annoying thing that Chrome does when you Command-Q to quit, where it wants you to hold down the keys to execute the command.

And, maybe a bit more of a stretch, the cars where if you want to open a locked door from the inside, requires you to pump the handle twice?