Some additional information about the property that is being occupied by the tree-sitters...

I did a little background research.  This 681 acre property is referred to as the Briger tract and it is related to the Scripps bio-medical research park project.  Of the total 681 acres, a total of 83.26 acres would be designated as a protected upland.  I am not 100% sure that the area exactly where the tree-sitters are part of this, but judging by the picture and the location it is likely that it is part of the protected area.  The 83.26 acres does not include the area for required landscape buffers or other open space.

It turns out that Mr. Tsolkas and company challenged the Comprehensive Plan change and final environmental permit.  Both challenges were dismissed.  The first one due to lack of "standing."  See links below for the final orders related to the challenges - there are two different items related to the Comprehensive Plan challenge.

Comprehensive Plan Challenge

Comprehensive Plan Challenge

Environmental Permit Challenge

So, by losing these two challenges, the tree-sitting exercise can be thought of as trespassing, sour grapes, publicity seeking and a fundraising opportunity with I-95 frontage.