It's like when all the prisoners in Orange is the new Black start to claim they are Jewish in order to get the nicer Kosher meals from the cafeteria.

Lol! I did that (sometimes) when I was in hospital in the UK. If you requested a halal meal they sourced it from a takeaway down the street, which was excellent, and a wonderful break from the usual dismal fare. I wasn't a dick about it, and would ask the meal order folks if it was OK to request one that day; sometimes they said 'yes', and sometimes not (based on what, I don't know), but they knew what was up, and didn't mind doing favors for those of us who'd been in a while. I'm still ridiculously grateful. The NHS (back then, a quarter century ago, now) was amazing.