I would hope that you are asking them to make announcements at the gate. As vegetarians who cannot have things with certain ingredients in them (won't kill us, but will make others WANT to kill my kid from his reaction) with one person having blood sugar problems...you can see that nuts are actually quite a large part of our diet. For a year now, we don't bring our PB&Js onto the plane b/c of posts here, we will eat them at the gate area. But plenty of others don't belong here, and haven't decided to make that change. So those people who might have issues like MY family could probably run into big problems on the plane, if an announcement isn't made until after the plane is closing up to take off.
The ingredient issues in my family make most of the pretzels and non-nut snacks on planes not OK and there are plenty of other people who have to or choose to not eat the same things we do (things based on corn syrup)...so if an announcement isn't made and there's a family like ours...it's putting that family into a very bad place.
So please try to make sure they announce it at the gate area...
As for clorox wipes...I *can* have a pretty nasty allergic reaction to those...FYI.