A while ago on this thread the Guv commented:
"....given a choice between EZY (expanding company going places) and Just Might Collapse flying 753s to TFS at zero dark hundred full of drunken yobbos... well, that's a pretty hard choice....."
Back in Sept, I pax'ed with JMC LGW-TFS on a 320
full of happy, well-behaved holiday-makers (mostly couples and young families like me). I was glad I wasn't travelling with the rowdy drunken rabble that turned up to board the EZY to AMS at the gate next to us.
Moral of this is, an airline cannot choose it's pax....all airlines offer at least some "cheap" fares (witness the latest BA offers), so risk attracting pax they would perhaps rather not carry given the choice.