Picture this scenario.

You make one really good birthday cake. Following the success of this went to your local school fete out of the goodness of your heart and set up a cake stall, had a complaints and suggestions box on the table, maybe even had a donation tin out. You know it's out of the goodness of you heart because everyone will SEE you doing this and maybe you'll get hired by the local bakery.

But then it's a bit of a long day and you start screaming at everyone who came up to you for wasting your time, rejected requests to not put broken glass fragments in the cakes, get into a fistfight with the local health inspector who pointed out you need certain food prep hygiene practices. You get big mad, and leave your stall in a huff, where hapless strangers stumble across your cakes only to find they are now covered in bugs and get sick from eating them.

Would this be acceptable or unacceptable behaviour on your part? Are you as the cake stall operator taking advantage of the the commons in any way (donations, showing off your bake-folio?) Are you damaging the commons or people visiting the commons? Does your free speech expressed in cake form outweigh the rights of people to tell you to change what you are doing? Does your freedom of expression mean you should never be accountable? Should people be thankful that you let them have cakes covered in bugs, even if they get sick as a result? Does the local health inspector who is an expert in a domain that overlaps with everything food have any standing?

This is a contrived thought exercise; obviously.

But I would bet that you clearly identify that violated social norms aren't great; you would agree there are expectations about access to a commons have implied standards of behaviour for all parties; you have expectations around quality vs general safety, etc.

Now imagine I make a weird cake and I think it's interesting. I put up a poster with a photo and a recipe and say "thought this was cool, try it if you want." And then some nonce comes along and tells me off for a reckless disregard of other people's time and nerves. Compares it to an open manhole cover that could get somebody killed.

Throwing some interesting code onto a web site isn't like setting up a booth at a community event. Its not even really like putting up a poster, since posters get seen by whoever happens to come nearby whereas web sites only get seen by people who seek them out, but it's about the closest you'll get to a real-world analogy.