If so, their efforts may be impeded by the fact that Exxon-Mobil has obtained a restraining order against GreenPeace. If they get within a couple of blocks of the Meyerson center, it's back to the pokey.
Of course if you remove intimidation from their arsenal, the leftists don't really have all that much left -- it isn't like they're going to persuade anybody with rational argument. Even having a largely sympathetic media doesn't help. During the Battle of Iraq, local TV affiliates were begging the national networks to quit endlessly airing the anti-war protests, because every time they did people reached for the remote.