For my part, anything is possible with player buy-in, it's just that I wouldn't want to do this as DM at all. I like to stay in my lane and prefer to avoid techniques that might give me undue influence over someone's character on a regular basis (even if it's inadvertent). I think it makes for a better play experience overall.
Fair enough, and if it's a sentiment Ovinomancer shares, consider me less baffled. For my part, I'm arguing from a position of idealism and theory more than practicality and experience. I haven't tackled a player request of this nature myself. I would be a little wary, but I don't think it would be logistically much different than a chainlock's imp.