It is not acceptable to dump waste in the expectation that others will clean it up for you.
This behaviour is little better than flytippng and will not be tolerated.
May I draw your attention to the relevant Society Rules:
Do not litter our field with your rubbish.
If it’s compostable build a compost bin and compost it.
If it’s not compostable take it home and use your brown or grey bin OR phone the council and arrange for it to be collected from your home address.