I assume the following is what would be applicable here:
If you gather and release data for the purpose of harming the person. For example, you want to intimidate them, hand out their name and address so people will come after them, and so on, these things are a crime. This can also be the case for causing fear to their family members as a result of releasing information. The statute being used to charge people at the federal level is 18 U.S.C. § 2261A (2015)
Per your link, the gathering and publishing of personal info about others from the internet is not illegal. Apparently the only crime would be using the data to commit blackmail, violence against a person, or property damage. The moral to the story is do not put personal info on the internet However since business and government info is accessible or sold from the internet, anonymity may be impossible.
18 U.S. Code § 2261A - Stalking
...
(2) with the intent to kill, injure, harass, intimidate, or place under surveillance with intent to kill, injure, harass, or intimidate another person, uses the mail, any interactive computer service or electronic communication service or electronic communication system of interstate commerce, or any other facility of interstate or foreign commerce to engage in a course of conduct that—
(A) places that person in reasonable fear of the death of or serious bodily injury to a person described in clause (i), (ii), or (iii) of paragraph (1)(A); or
(B) causes, attempts to cause, or would be reasonably expected to cause substantial emotional distress to a person described in clause (i), (ii), or (iii) of paragraph (1)(A),
shall be punished as provided in section 2261(b) of this title.