Gate and FA's appreciate it. I used to do it when jumping offline.

But as flight crew, I'm generally not eating anything provided by a stranger, more likely will give it to the FA's. Besides the obvious security issue, I once had both the FA and FO get sick in flight from nonrev cookies (I'm sure it was just food poisoning)... FA told us later, and the FO started feeling it on the approach, he was full-on praying to the porcelain god by the time he got to the hotel. Another 15 minutes in flight and it would have been awkward, and there would have been paperwork. Fortunately I was trying to lose weight that week.