I'm pretty sure the "mocking" comment was supposed to be a joke (although it's kind of a weird joke, which is why I think people are concerned it's a real comment). It's pretty common to see theater-goers who are solo, and I can't imagine that it registers on the ushers/house managers/etc at all (or on other patrons -- I couldn't tell you whether the people sitting next to me are there by themselves or not in most cases).
And obviously the actors have absolutely no idea who in the audience is there by themselves. Actually, come to think of it, the ushers have no idea either, really; plenty of people meet up at the seats and I highly doubt they care enough to keep track.
"What was the name of that cheese that I like?"
"you can't run away forever...but there's nothing wrong with getting a good head start"
"well I hope and I pray, that maybe someday, you'll walk in the room with my heart"