...or I'll just go over my favourites and delete them in one fell swoop. There's little to gain by deleting them slowly (unlike with tweets).
But on second thought, I may give up on the delete slowly idea, and just kill them all, save the pinned one in one go. I mean, what's the advantage of deleting in smaller steps? My content remains there longer. What for? Why is it useful?
Killing them all it will be.