Sadly, whenever I'm back in the UK I experience the same crap but not just Gatwick/Crawley area but on most roads.
At least in the UK it's just the roads that are surrounded by litter. At NAP there is FOD (foreign object debris) blowing over the runways. Whereas at a UK aeroport a pilot will go around if he spots an object on the runway, the runway is closed for runway inspection and a car goes out to remove the offending object, at NAP I think pilots just put their faith in God and land in hope.