I was walking my dog along Hope Street in Old Glossop, when nature took its course Bess relieved herself on the pavement.

Being a responsible dog owner I whipped out a plastic bag and picked it up. A few yards down the street was a wheely bin in someone's yard facing the road and as I walked past, I lifted the lid dropped the bag inside.

Almost instantly the door of the house burst open, and a man, wine glass in hand, exclaimed at me "Could you not do that please!"
I responded that I was "sorry 'sir'" and that I hadn't meant to upset him.
After passing me the plastic bag he complained that he "had children you know," again reiterating I should not do this again..

Is justifiable for me to be confused and hurt by this incident?

I had not meant to do something that anyone objected to - I merely thought that people generally preferred not to tread in dog poo and so had picked it up.
Prior to this incident, I don't think I would have thought twice about putting a bag in someone's wheely bin, In the same way I wouldn't think twice about putting a sweet wrapper or crisp packet in their bin.

Is it me who is wrong here?

It seemed to me like this gentleman would have preferred me to leave the dog poo on the pavement outside his house than anything else, lest I dirty his rubbish bin. It would also seem he is worried about his children coming into contact with things in his rubbish bin.
This I cannot understand - does he let his children play in his wheely bin when it has rubbish in it?

Am I right to be unhappy?

Would you object someone putting such a bag in your wheely bin?

For what it's worth, I ended up just putting it in a different wheely bin a few yards further on.