To be honest, I probably wouldn't myself without being reminded. FOGcon, according to the account above, did make a point of reminding attendees.

(I should say that I have not myself had anything to do with FOGcon, so I'm only going by the accounts above. FOGcon's joke seems to have been accompanied by some reasonable amount of effort to minimise the harm done, but I'm still dubious about the whole idea of fake program items in principle.)