The better alternative is to use random passwords (from a bookmarklet, for instance) so that you'll have no psychological resistance to changing it to ditch a crappy service.

The only problem with this approach is that you cannot de-provision individual bad actors. It's an all or nothing approach. There's a lot of work involved in re-provisioning the good guys, and where there's work, there's psychological resistance.

Agreed. It should be obvious from Twitter by now that folks like building services. It would take a few days of engineering to create "temporary" logins these services could use.

What about a meta-app that handles changing your Twitter password at all these other apps? :-)