Didcot's Public Bins

Firstly, I would like to apologise in advance. This is a very specific rant, and afterwards, I suspect, you will be none the wiser.

The estate on which I live, Ladygrove in Didcot, is a modern estate, built after 1988, and has a reasonable network of cycle paths, dog walking tracks, paths and roads. At strategic places there are bins and dog waste bins. There is a usually a large amount of rubbish outside the shops and pub which does not get cleared up. However, the bins are used by people walking around the estate, as indeed they should be.

These are emptied on a reasonably regular basis, although in some cases they could be more often. My problem comes in the way in which they are emptied. I assume that the council amenities department send a refuse van around the bins and that the wastes are treated as general household refuse. The evidence of this is twofold. Firstly, as would be expected, the bins are occasionally empty. Secondly, and this is my issue, there is a large pile of small waste plastic bags (freezer bags, sandwich bags, etc.), all neatly tied and containing a small amount of substance, in a pile to the side of the bin. Again, I am assuming a lot here, but I suspect with reasonable accuracy. The most logical conclusion is that dog walkers are putting bags of dog waste into the bins (in preference to the specific dog waste bins which are usually some distance away) and then these are being taken out by the refuse collectors.

The pile of waste bags never get taken away, they remain until they get very soggy, flooded, kicked into the hedgerows or otherwise litter the rest of the estate. I understand that there is something of a health hazard in the bin men taking away dog waste, but there are a lot of problems with the approach being taken:
more people are affected by dog excreta being scattered around the estate;
there is no signage or warning that bagged dog mess is not permitted in the bins;
there seems to be no way for the bin men to be sure both that the bags actually contain dog mess (I can't believe that they check each bag), and that there they are actually removing all the bagged dog mess from the bins;
the whole process seems to decrease from the overall level of Environmental Health, which is ironic from the Environmental Health Department.

As I see it, there are several solutions, which to the best of my knowledge have not been tried:
clearly warn people that bagged dog mess is not allowed in the bins;
provide specific bins next to all of the normal bins;
accept that there will be dog wastes in the bins and develop procedures for ensuring that the bin men are protected (e.g., a specific round performed in the same way as for the dog waste bins themselves).

Of course, I could be wrong and there could be a far better explanation for the bags of rubbish, but I suspect that I am right.

Thank you for your indulgence.