Well its as they say .... Two things in life should be compulsory :
1. A holiday in Las Vegas.
2. A flight with Ryanair.
I've managed to avoid both so far!
Regarding Prestwick not being Glasgow - well it was the t/atl airport for that part of Scotland for many, many years. They relaxed that rule a decade or two ago - we can't blame Cryanair for that one.