My God, these people are mentally deficient! Why aren't they in jail?

Dock their pay. Make them reimburse the customers who were inconvenienced by their little display of, forgive the pun, power.

Bet they wouldn't do it again.

Heres another report of a protest power outage.
PARIS (Reuters) - Wildcat strikes blacked out parts of two major French cities as power workers began a national day of action against government plans to partially privatise the state-owned utility Electricite de France (EdF).

Well here's what RWR would do.
“One of the most important thing Ronald Reagan did during his presidency was break the 1981 air traffic controllers’ strike, which helped break the hold of organized labor over the U.S. economy (1999).” Pels states, “48 Hours after the walkout, he proceeded to fire the 11,350 ATC’s (almost 70% of the workforce) who had not returned to work. In case the message was still unclear, he declared a lifetime ban on the rehiring of the strikers by the FAA (1995).”

I have a feeling this sort of action would be the miracle that France needs to wrestle the country back from the various special interest groups.