Gate-crashing trade fairs is fun! I once went to one about factory automation ('Automatica') here in Munich to spy on the competition of the customers of a friend. It was very odd, as those halls that are empty on these pictures were brimful of whirring huuuuuge orange robot arms, and 95% or more of people in the hall were male.

I actually found out that said competition had NOT stolen those customers' patents.-