I'm not against generality, though don't think there are many places this actually comes up (the cloned menus shouldn't be affecting more than a couple people these days, and aren't the result of an explicit API call). 

For this particular call (peer_create) I just think the caller should be passing in the parent window as in other Tkinter widget creation commands, rather than the full widget path. On the exact implementation of the call I'm open to whatever works!