I have an alternate viewpoint on all this.

You bought the program through their App stores, so absolutely they can and should have a kill switch for those programs. The real issue is forcing users to only use that app store. If users have a choice between sideloading content and a creator-owned DRM'd App store, then the owners of the App store and kill switch as many apps as they want. Users will still have the choice to go straight to the developers for DRM free apps to sideload.

There's also a difference in context between DRM'd programs and DRM'd media. Those programs have a fairly small footprint of machines they can run on. Especially in the case of phones, DRM'd apps make perfect sense.

DRM'd media on the other hand, doesn't. There are literally countless devices that can use these and that users should be able to use. Unless the DRM transparently allows that user to do that, its bad DRM.

Valve's Steam is an example of DRM done right. Not perfect, but amazingly executed nonetheless. It satisfies one of the principle complaints of DRM: that you can't take it with you. Not only will Steam allow you to install the same program on an unlimited number of computers, but its also cross-platform now.

EDIT:

Not to say that I am a huge fan of DRM. I'm just saying that DRM doesn't always have to be this huge terrible monster. The half-baked solutions are terrible and the men who dreamt them up should rightly be flayed alive. A DRM that is transparent and is tied to YOU not a machine though, isn't something that should be demonized.