Who said anything about the excessive prices? And the VAT rip-off on ex-EU flights?
I think there is more to it, and you are not going to stop it by closing the bars in the mornings. It does need looking into as if you want to change behaviour, you have to understand it.
Oh, and how many repeat offenders are you aware of? I can't ever recall seeing a news report that suggested the offender had done it before. I'm not saying they should get off scot-free, but are we really worried about a 60 year old who offended 30 years ago?