> Its just good manners so that your customers/suppliers can know who they are dealing with.
That's the (widespread) issue, treating personal websites and online communities like businesses. Some are, but that's not something to encourage or assume.
I live in the Czech Republic, where you can buy a SIM card anonymously and build a website without identifying yourself. I don't see a good reason for other countries to not give their citizens the same freedom, and am vehemently against reducing freedom just because "other countries do it".
> I live in the Czech Republic ....build a website without identifying yourself
I am not familiar with Czech Republic law but out of curiosity I asked an LLM:
I then did a quick Google to attempt to validate the LLM and it seems this is indeed true, I found https://www.zakonyprolidi.cz/cs/2012-89 and putting it through Google Translate, §435 is pretty clear that publication of name and address is required.