To put it simply: yes, yes, and yes.
To put it a little less simply: When your domain is registered, you’re required to maintain a publicly viewable WHOIS database that displays all your contact details — including home address and phone number. This puts you at risk of spam and identity theft.
Luckily, you can keep your info hidden from the public eye by opting to use ButumHost’s Domain Privacy Protection. Interested parties will still be able to contact you if they so please, but your identity will remain anonymous.