Calling XJTAG on the poor taste of their exhibit is fine. But attacking the women personally is over the top.
Two women shows up at a trade show in skimpy dresses, and you call them "hookers". That's a stretch. Of all the things I heard about the XJTAG girls, your comment is by far the most sexist and degrading.
To me, tricks like XJTAG girls are a red flag that smells of desperation. They were more than a social gaffe, they were a business error.