I don't normally comment on threads that begin to take on a debating tone, but this is an issue my daughter and I deal with every day and have dealt with numerous times at WDW, so I'm going to weigh in here. The example given above of naproxen is really not applicable here, as it is highly unlikely that a chef will take medication while standing over food preparation areas. However, I would think that strawberries would be present in every full service restaurant's kitchen since they are used in desserts, fruit salads, sauces, as garnishes, etc. It is not micromanaging or overkill to do EVERYTHING possible to ensure that no cross-contamination takes place, especially when a severe reaction is likely to occur without that safety net. A reaction from cross-contamination does not have to be life-threatening to ruin the better part of a vacation - trust me, I know.
Each time I am going on a WDW trip, I e-mail Brenda Bennett - she deals with special dietary needs for WDW guests on a daily basis - to let her know our trip dates and what ADR's we have. She responds to me by e-mail, making sure our special dietary needs are noted on each ADR and attaching copies of what counter service foods are safe for my daughter and myself at each park and resort. When we arrive at each ADR, the server notifies the chef so that we can discuss the menu items available to us and what modifications can be made. By notifying them ahead of time, they are prepared for modifications or substitutions that they might not otherwise be able to make. This alleviates stress for us and them, and we always have a great meal without any negative physical reaction at all. In speaking with one of the more talkative chefs at Turf Club, he recently shared with us that he checks all ADR's AHEAD OF TIME so that he can see what dietary restrictions he needs to be prepared for - and that was straight from the horse's mouth, so to speak.
I can't comment on the rude CM aspect that the OP relayed in her original post since I didn't hear the conversation (and we all know that the way something is said is just as important as what is said) - I just wanted to say that noting dietary restrictions on ADR's is not micromanaging, overkill or WDW wanting to CYA - it is what the chefs themselves want us to do because it makes their jobs easier for them and our dining experiences safer for us.