German here. My last employer was visibly confused when I told him that I neither have a Whatsapp account nor a smartphone, and didn’t want either one. Apparently it was his preferred way of changing shifts last minute and he was pissed that I didn’t want to participate in that bullshit. So you want to send me a notification after effing midnight that I have to come in at 5 AM instead of 6 AM? Miss me with that shit.
Luckily I found a better job elsewhere (and they do NOT require any social media accounts - if they want to change something, they call me and ASK whether I am ok with it).