Nothing happened here

Someone in Paris has a sense of humour. According to the most recent Paris briefing from the Economist Cities Guide:

A mysterious public artist seems to be poking fun at the city’s glorification of its notable former residents. Now, along with plaques on houses boasting Victor Hugo as an erstwhile tenant, there are signs proclaiming that on "the 17th of April 1967 nothing happened here". On a wall in the chic seventh arrondissement, a plaque now informs us that Karima Bentiffa, an otherwise unknown civil servant, lived at 9 rue Pérignon from 1984 to 1989. How long can this phantom plaque-maker continue his entertaining mischief?