why does sportcardforum.com want so much personal info?

[faceless105]

I love this site. It's where I started doing TTM! Recently I wanted to look up a couple athlete addresses and was pointed towards scf but you have to log in to view the addresses, which seemed like no big deal until I went to make an account and I'm kinda blown away by the amount of personal info they're asking for. Is there a reason they're asking for my real name, home address and telephone number?