I remember (middle 1990's) working in a food factory where one of the resident food scientists was Jewish. She had a sense of humour and would sit in the lunch-room eating either prawn cocktail or smokey bacon crisps, just to see how long it took before people tried not to stare and nudge each other. And if anyone remarked on the incongruity and tried really hard not to call her out on it. It took about three quarters of an hour before somebody might go "Errr... Rivka? The, errr, crisps? And you being, err. You know. Err."
It was class trolling, or perhaps in this case golleming.
Rivka would let them suffer and squirm a little more, then she'd explain that with some - but not all - makes of smokey bacon crisp, the flavouring ingredients involved had never so much seen a pig in their lives. "Of course there is a school of thought in Judiasm that argues that if a chemical is synthesised in a lab to mimic the flavour of pork produce, the intention involved makes it traife, but that's rabbinical-level thinking. I did a BSc and an MSc in food science, so I take a different viewpoint. Besides, they taste good. Same with the prawn cocktail. The only way these would ever touch a prawn would be if I throw them in the sea and I'm not going to do that as these cost 30p a bag and I like the taste. Oh, and all the other ingredients are completely kashrut."
The killer line was that the one flavour of crisp that the layman might think would sell like hot matzos in Israel - Roast Chicken - was one that no observant Jewish person would even touch in a shop display. The reason being - no actual chicken in them. But lots of pork-derived flavouring agents to mimic the taste of chicken. (And as she stressed, in most brands but not all of them. You have, she said, to pay close attention to the ingredients list and the manufacturing process. Which her first two degrees and her ongoing work on a PhD were qualifying her for.).