Yesterday was a bad day for hard-core environmental activists in the East Bay. Following a court ruling that mostly paved the way for construction on UC Berkeley’s sports training center to proceed, Cal officials hauled another tree-sitter out of the oak grove that is slated for demolition. In addition, with no food being allowed to the tree-sitter, the Trib reports that some people are talking about a hunger strike. How exactly will their weakened hands hold onto the branches, we wonder? They’d better hope they’ve stockpiled pleny of gorp. Meanwhile, former Oakland resident and violin instructor Briana Waters was sentenced to six years in federal prison yesterday, following her conviction on charges of arson. Prosecutors claimed Waters helped the Earth Liberation Front torch a research facility where scientists were rumored to be genetically modifying trees.