Yes some of that stuff is only for those in a relationship but as discussed elsewhere the things aimed at keeping a distance between the WG and your ID and life (such as a punting phone) are (in my view) essential for all.
Ahhh makes sense but what's worst case scenario, maybe seeing wg walking down same street for me, if that was the case dunno if nothing was said say nothing
If someone said hello respond in measure
Think there is some unwritten rule on not blowing one another up in those stakes
Phone wise just using my normal one, no on else uses it, God forbid I ever change number insurance scams would have no one to text
Can understand the phone thing if your married and such though