[kerkeslager]

They only know which currency they're accepting if they verify that the binary they're running is connected to the blockchain which follows the rules they want.

Admittedly, that's beyond the technical ability of many people, but names don't solve this problem in any way. I can pull a copy of the BCH source code, find/replace every displayed text that says "Bitcoin Cash" with "Bitcoin" but that changes nothing about the currency being exchanged.