Word here from one who serves herself whilst onboard. Most times its not a problem, but once an FA did stop me from opening one of the bottles I brought with me.
Why do I bring my own? Because I like wine and I don't believe flying commercial means I should be forced to drink that cheap headache wine they serve. So, I bring a wine bag that holds an opener, a couple bottles and a glass or two, then I'm set.
I don't know what Diane would make of this, maybe some legislation would address it under subsection 3.2.01, part 6, sub-part of 4.
Anyway, thanks for the thread. Here I thought they frowned on me bringing on my own wine because I was avoiding some type of corkage fee!