As I understand it, blanking a page for of any reason is called vandalism. If you have a problem with the article then comment on it in the talk page or remove the negative information yourself.  
Blanking a page for BLP reasons is not vandalism. You should also be aware that when you restore potentially damaging material, you are the one taking responsibility for it, the same as if you had put it there in the first place. Also, the blocking policy now states "Editors who repeatedly insert unsourced or poorly sourced contentious biographical material about living persons to articles or talk pages may be blocked for disruption. Blocks made for this reason are designed to keep the material off the page until it is written and sourced in accordance with the content policies, including WP:BLP, and should therefore be kept short in the first instance." -Mexcellent