Binding existed in the form of charm person scrolls and was removed.
I don't see how any replacement for something taken away from the players could really generate any steam... just a lot of hot air. I don't mean to sound like a negative nancy, but you may not have been here to see when charm could be scrolled, or when people could issue commands as benign as "sit" when charmed. From what I gather, robbing players of control of their characters through anything other than death is complicated territory from a balance perspective.
Plus, honestly and more importantly...
The people who would enjoy it are the same people who would probably do it willingly without the system forcing it upon them.
I mean, when was the last time you tied someone up? Let me tell you that consent, even if veiled by a bit of roleplay, is still an important factor.
Happy belated Valentine's Day.