I can understand the frustration everyone is expressing. Here in Donegal (right up the top of Ireland), we have some superb countryside. Yet, you pull over to some of the nice little picnic areas the council provide and you find all the assorted crud of the day. How people can have a picnic, light a BBQ, drink a gallon of beer and then just walk away - leaving the entire thing on the table - is beyond me. Myself and herself had a beach picnic a couple of weekends ago. We packed up every thing - yet the couple next to us were quite happy to shove it all in a carrier bag and then just leave the bag sitting on the table.
But, what gets me more than anything is being out on the hills for a walk, coming to a nice flat rock and finding the remains of a fire that has obvioulsy burned long after the idiot who lit it in the first place has departed.
Aghhhh