Huh? A legal campaign would severely escalate the problem, cost time and money, and prevent the scientists from doing their work.
Besides, the international aspect of the issue:
"TARGET: Oxford University professor Michael Sharpe"
"INVESTIGATOR: David Tuller at his home in San Francisco": he blogs, sends hundreds of letters and emails, and travels the world giving speeches and holding meetings as supporters send him donations and praise for his CFS/ME campaign.
There's such little thought put into actions because action is immediate and satisfaction is self-served. A group dedicated to seeking action will always find something to nit-pick over to add fuel to the fire. If the desire is bad enough, emotion will surpass logic, which is like an addiction.
When people favor their actions over thinking, and neglect consequences, they will do things that make no sense or do more harm than good. But I suppose as long as someone gets their way, none of that matters to them.
If the researcher removes themselves from social media they're insulated from the outrage in multiple layers. They don't see it, and they're not leaving any of their personal actions behind to be complained about.