Who is the idiot here though? They got a date out of it that they wouldn't have gotten if they had listed their true height. That means there's a chance that they otherwise wouldn't have had. The girl can either find that a turn-off, or she doesn't even think about it and starts looking at who he is rather than what he is. Might even cure her paranoia that dating a short girl puts her under slaves and beggars on the social ladder. So for the guy it's a situation wherein he can't lose.

And please. If girls can tweak their weight with a number that the scale told them 5 years ago, guys can fiddle around with their heights a bit. Some numbers also just look better. If you're 100 kg, just pen down 95 kg and nobody bats an eye. If you're 178 cm, just write 180 cm. It's a small white lie but it cancels so much superficial bullshit that would otherwise get you turned down immediately.