A Czech Court Ruled the strike illegal ( as courts everywhere always do ) because the notice of strike had to be given at least three working days in advance.
http://www.forbes.com/feeds/ap/2011/06/12/general-eu-czech-transport-strike_8512513.html
According to polls, most Czechs support the strike.
http://www.ceskenoviny.cz/news/zpravy/most-czech-are-for-strike-but-against-road-blockades-poll/650238