Actually most of the pressure has been social, i.e. peer pressure. "Why aren't you using this app? How can I reach you?" etc. Just have to say no and stick to your own plan.
It's not that simple though. Those people aren't pressuring you into doing drugs, they just want to be in touch – hardly a crime. Just saying "no" without providing some kind of credible alternative can make you a hermit, and not everyone is OK with that.
If you don't want to be bothered you don't want to be bothered. Also it's not like you're off the grid. You have more structured (and meaningful) communication on non-immediate devices, when you want it. People who care will reach you no matter.