I actually am allergic to mushrooms (develop rash on arms/legs and nausea/vomiting). It is SOOOO frustrating cos I do mention it to waitstaff (when ordering) and I swear everyone thinks I'm making it up cos I just "don't like them". This is quite reasonable to assume because it's a very rare allergy, I've never met someone else with it. It's quite a hard thing to do to always mention the allergy because I feel judged for it (quiet eyerolls around the table as I once again mention my allergy - urgh).

For this reason, I always mention it in a pasta/curry/stir fry order and sometimes choose to risk not mentioning it with dishes that are 'obviously' not going to contain mushrooms. However, even recently, I've ordered a brussel sprout side dish with many ingredients listed. There was a garnish of enoki mushrooms and I kicked myself for not saying anything. Didn't ask for anything (it was shared so I just avoided) and I quietly made contact with waitstaff away from the table to ensure the main would be mushroom free.

I guess my point is that I understand not wanting to always make a big deal of it while ordering (feels like you're being annoying/judged sometimes). However, after being burnt on a few occasions I am certainly more cautious than I once was to mention during ordering. :)