My stance, in both centralized and decentralized platforms, is that noboydy owes anyone a tool for free speech (especially if maintaining it requires money) and anyone can censor what they want, on their own server (in both centralized and decentralized platforms).

However, maximally permissive rules are to be preferred in general-purpose platforms. Not in the sense that the opposite is immoral, but rather that preferring them and providing them, although not mandatory, leads to the best consequences and is a better contribution for society.

Of course, anything which threatens the existence of usability of the relay (spam and illegal content) should be removed (else everything would).