I bet they can, but then you'll need a separate recipe for each different command, and as a user you'll need to enable each command before you can use it. This

I bet they can, but then you'll need a separate recipe for each different command, and as a user you'll need to enable each command before you can use it. This way you just start by tweeting and it just works (after 1st oauth process that is, that is initiated as a reply to your tweet)