El C (T-C-L), the admin who protected the article, suppressed every edit by the IP as "RD2: Grossly insulting, degrading, or offensive material". If you look that up, the policy says:
Now I don't think there's anything of encyclopedia value in changing the number 16 to the number 7, but there's no reason to remove it from the history.Grossly insulting, degrading, or offensive material that has little to no encyclopedic or project value, or violates our biographies of living people policy. This includes slurs, smears, and grossly offensive material of little or no encyclopedic value, but not mere factual statements, and not "ordinary" incivility, personal attacks or conduct accusations. When pages with grossly improper titles are in question, the page names may also be removed from the page creation, move, and delete logs.
Fun fact: The age of consent in Minnesota is 16. Wikipedia's article now says it is 17. Thanks to El C, I can't tell who screwed it up, but I assume he did. Wikipedia at its finest.