Talking of skip diving, our local 'household waste disposal' site lets one throw unwanted wood/timber away, BUT they will not let anyone take any out! What is the matter with these 'jobworthies'?
If it's a Council tip then I am not sure it is the fault of the guys that actually work there. My local tip is covered with CCTV cameras which are monitored remotely, climbing in & taking stuff out would be against Health & Safety regulations so if they allowed people to hop in & take stuff out then it could potentially be their job on the line. I could easily be wrong but that's how I have always seen it with the Council tips.