There are numerous references to “the tree of liberty” in that Pajamas Media thread: The PJ Tatler Occupy L.A. Speaker: Violence will be Necessary to Achieve Our Goals

Sometimes the Tree of Liberty needs watering with the blood of tyrants and patriots.This may well be one of those times.so be it.

[…]

The Ohio NG was using standard M-2 ball ammo, as per Geneva Conventions.
Cops, and civilians, are not so constrained, and will be using soft-point/hollow-point hunting and self-defense rounds that are much more lethal.

“The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.”
- Thomas Jefferson

[…]

Looks like I need to go to Walmart and get some more 00 buck for my 870. If they want to attack me here out in the peaceful country of Tidewater Virginia, they will have me and many of my friends who are armed, trained and ready. BTW, 30 years retired military so I have some training with firearms. Thomas Jefferson said that the Tree of Liberty needs to be refreshed from time to time with a revolution so bring it, you foolish ones! Vote for Liberty, vote Ron Paul 2012!