On Saturday morning, I joined the Friends of Eatock Lodge in a litter-pick. The main things we retrieved were drinks cans, bread wrappers and bags full of dog crap.
So, if you're one of those who drinks in the park, why can't you chuck your cans in one of the five litterbins? There's one at each entrance to the lodge, so you can do it on your way home.
If you care enough to go to feed the ducks, why do you then leave the plastic wrapper behind? Ducks don't like eating plastic. Same as above - stick it in the bin!
As for those who leave bags of dog crap behind, you are just scum. Stick it in the bloody bin! Think about it, you brainless idiots! By bagging it and then chucking the bag in the bushes, you have turned something that would have washed away in a few days, into something which will take months to even begin biodegrading. It'd be better if you just chucked the crap into the bushes without bagging it, if you're too bone idle to put it in the bins which you have to walk past on your way out of the park anyway.