#1: Absolutely.

#2: I've seen some spicy takes, at least in the politics communities. Others, people are generally just more chill. I consider that a feature.

#3: The upcoming 0.19.0 will let users block instances as well as users/communities. Filters are unfortunately a client-specific feature right now, but fortunately there are a lot of clients to choose from now.

#4: 0.19.0 has this. Users can export their profile settings data (including subscriptions and blocklists) and import those elsewhere.