> Having them compare unequal means you can't actually trust unbound
> method comparison, nor using unbound methods as keys in a dictionary.

"Trust" is a strong word. You can trust the comparison operator if you
agree with its semantics, you cannot trust it if you want different
semantics. But that doesn't mean it is generally trustworthy or
untrustworthy.

Really, this is the same as with numbers:

'b'