The letter writing campaign provides some measure of release, but as already been said, is pretty pointless, given the "what can we do, they're Rangers and we need them" rhetoric coming out of the SFA/SPL/Boardrooms.
I've written to my MSP, and the First Minister requesting that they don't condone tax evasion on such a grand scale.
I've written to my Club's Chairman, both as a fan and a shareholder, expressing my dissatisfaction with the lack of rebuttals to the many "Scottish football needs Rangers" comments and opinions in the National Media.
Getting any kind of mass protest organised is probably wishful thinking, but I certainly think it shouldn't be beyond each set of fans to convince themselves that some kind of visible action needs to be taken.
What that is, I have no idea.