We're having a little discussion in the Teachers' Lounge (a site-wide chatroom for ♦ moderators).
Sometimes, we need to destroy accounts (e.g. in the case of spammers). This is an operation which involves going to the user's profile and a couple of clicks in the following dialogs (not unlike flagging a post or voting to close it). Most dialogs on Stack Exchange have keyboard shortcuts enabled, which (once you get used to them) are a lot faster than clicking.
The keyboard shortcuts for destroying an account are almost working, but one of the moderators argued that one shouldn't use keyboard shortcuts for a dangerous, irreversible process like this; it's just too easy to make mistakes, destroying a user even if it wasn't your intention. For those of you who are worried: destroying a user with keyboard shortcuts still takes five or six keystrokes; that's unlikely to happen by accident.
This discussion lead to my (generalized) question. Has there been any research on the following:
Are users more likely to make mistakes with functionality which is easier to access?
(Of course, if it's easier to access, it will probably be used more often, leading to more mistakes. I'm interested in the relative amount.)
Personal experience with this could be helpful as well, but please refrain from misusing anecdotal evidence (of the "I once made a mistake because of ..." type).