I go through my apps and put most of them to deep sleep, ie never work in foreground. Later I heard from an internet stranger that a mobile operators app prevents users from using their phone as a Wifi hotspot.

Why would you allow notifications from most apps? What could the McDonald’s app possibly offer to warrant allowing it to dictate your attention for even a fraction of a second?

This is, uh, kind of missing the point, isn't it?

"Hey, this megacorporation made me download an app to buy food from them, and now it's being creepy."

"Have you considered that it's actually all your fault?"

I donno a flash deal or something?

For the few times a year I eat at Burger King, I just install the app on the way, use the discount, and uninstall it right after while I'm still eating.