Rising Tide and associated activist organisations are planning a day of action on April 1st, coined Fossil Fools Day. This may coincide with a Greenpeace invasion of a coal-fired power station or an action targeting an oil facility.
A quote from their website:
http://www.fossilfoolsday.org/
"Target a local fossil fool - See the clowns investing in coal - The carbon offset contortionist or the oily strong man? and join with thousands around the world in taking one step closer to dismantling the fossil fuel industry. Find a fossil fool in your community and pull a prank that packs a punch."