What evidence would they have to arrest people on?
Message in big group chat and phone number. Message can for example say that war is bad, and as result you will be charhed with “discreditation of army”.
Especially now that people don’t have to share phone numbers to add a contact
Phone number that tied to your passport. Yep, not sharing phone number to add a contact will magically help here.
Is it something new? I don’t remember it being a thing.
In certain countries(Russia) you need passport to buy SIM card. So phone number is tied to person.