It depends on who you are releasing information about.
What you are suggest is often referred to as "doxxing" - the releasing of private information about an individual - and its not as straight forward as "nothing will happen to you".
In the US, if you do this to a "covered person", you can potentially find yourself with a large fine, or even up to 5 years in prison under 18 U.S. Code § 119.Protection of individuals performing certain official duties
Under the above code, the following is counted as "restricted information":
the term “restricted personal information” means, with respect to an individual, the Social Security number, the home address, home phone number, mobile phone number, personal email, or home fax number of, and identifiable to, that individual;