I'm a crazy homeless person, my name is Adam Smith, nice to meet you. Or was it John Brown? Do they check government-issued ID? I'm visiting from BC or Ontario, you think they could recognize a fake ID?
I think the logic is that if you have successfully guessed a name that is good enough for them - remember - we are talking about people who are literally walking in off the street - they aren't trying to 'game the system' - they might not even know where the hell they are
some places ask for ids - but really a lot of places you just need to have the name - that's all