Until Facebook, Twitter and other sites plug the privacy hole, it's best not to use a public WiFi connection to access your personal accounts. Was it ever a go

Until Facebook, Twitter and other sites plug the privacy hole, it's best not to use a public WiFi connection to access your personal accounts. Was it ever a good idea to access personal accounts over a public WiFi connection? I rarely connect to a router I don't own...instead, I either tether using my phone (I've been doing this on Sprint since 2000) or use my MiFi.