This account is a virtual actor used to represent the server itself and not any individual user.
It is used for federation purposes and should not be blocked unless you want to block the whole instance, in which case you should use a domain block.
This is a Mastodon server for Art. Don't post illegal stuff and try to play nice.
BTC donations for server time are gladly accepted at 1CPysvKmAr2Tt34ygoQUoXeVn9irhx7Fvr.