The next question I always get is about how annoying it is to go make an email address in the middle of checking out is. I personally always have a shell open - I'm a command line person. So I just run a script, `nem spammystore-com190621`, done. (And then `dem spammystorewhatever` when they start annoying me.)
I've fantasized about writing a browser plugin that scans the page for entered email addresses and shells out to create them on submit, but (a) I'm not even sure that's entirely possible anymore, and (b) wiring my browser up to something that runs sudo on remote machines seems like maybe not the best idea I've ever had.