Nobody in here mentioned it: phone numbers were leaked, too. Which I consider even worse.
I wanted to sign up for Flickr, but the Yahoo login requirement was a big turnoff, because it requires a phone number. This nagged me so much that I never did it.
Turns out: right decision. Because my 8 year old phone number isn't target of spam yet.
Phone number being a requirement for signup is bad. There are providers who mandate a valid phone, which they verify through SMS or call, even for paid accounts and services (not just for the payment processing step). Whenever possible, I avoid signing up for such services.
I wanted to sign up for Flickr, but the Yahoo login requirement was a big turnoff, because it requires a phone number. This nagged me so much that I never did it.
Turns out: right decision. Because my 8 year old phone number isn't target of spam yet.