Hi! New to this all. From Reddit. I mod a few communities on reddit, nothing big but they are tech related. I know a lot of people on both would want to come over, since everybody is pretty upset with reddit rn.

I just have a few questions maybe somebody could help me with;

Where are instances hosted? Can I host an instance myself?

Our accounts, I heard something about them being cross-platform with some other related websites to this, where are they hosted?

Mastadon's code of conduct says 'Protect our community from harassment, malicious or illegal content', what qualifies as illegal? Something that is illegal in China can be legal in other countries, and vice versa.

I only ask because I see a lot of gray in the rules, which I get is needed, but in the end why have rules if it is all up to the judgement of the particular administrator reviewing the case.