[tomjen3]

Do you think Twitter should have a shared default blocklist?

That would kill Twitter almost immediately as everybody is added to the list (if nothing else, as a retaliation for somebody else adding them to the list) or do you mean that they should have the slightly more intelligent blocking features it has (including young accounts and/or accounts with few followers)? Because they are pretty easy to bypass by having a bunch of accounts follow each other and create them well ahead of time (and no Twitter can't prevent this: finding cliques in a graph is NP-Complete, and Twitters graph is crazy big).

Twitter could add many things, but they haven't even figured out that they need to accounts with female names and portraits and user names that ends in a number, even though they are always spammers.

[eropple]

I think shared blocklists are great. As defaults, probably not. I don't use any shared lists because nobody's going to take a serious run at me, I just don't want to spike my blood pressure seeing the egg/anime smurf accounts well-actually at me.

But I think network-effect block lists are probably a good idea. Nobody who follows Sargon of Akkad or other white-supremacist dorks is somebody I am ever going to want to hear from, so tube their tweets. That sort of thing.