This wasn't a sign. It was a reaction to a statement on a T-shirt.
Mr. Thipu enjoys wearing shirts from Think Geek. On our recent vacation he brought one that read 'Schroedinger's cat is dead' on the front and 'Schroedinger's cat is not dead' on the back. There were a surprising number of people who were a bit judgmental.
'You really don't like cats, do you?'. He stopped counting after the tenth comment but he still wore the shirt.