I have about 10 FB friends - practically everyone in the world is friends of my Brazilian adopted sister in Rio! She has family in Canada (her sister married a Canadian), all over Brazil and when she visited England in her early 20s she brought her best friend, who I also really liked, so I added her as a FB friend, and now I seem to have got her whole American Italian family ( tbh, one I don't like that much, because she's a staunch Republican Trump fan and heaven help anyone who disagrees with his POV!). For all that, it's useful to be able to keep in touch, laugh at the jokes, admire the DC and DGC and a nice way to hear new ideas. If I want to react in a deeper way, I'll send an e-mail or maybe even by old-fashioned snail mail!