There is arguing with the science you don't agree with and there is behaviour like this. What do you feel will be achieved? Many people with M.E have varying symptoms over time (sometimes over months but sometimes in one day). That is used to tell people their symptoms aren't real, when that isn't the case. So don't go out there getting a journalist on side to say PG's symptoms varied. What will that achieve? By trying to discredit someone's personal story, you risk turning more people against the community. Who are you to say what PG experienced or didn't experienced, anyway - you might not want to hear that but its the truth, just as some others have differences in their symptoms and don't understand why but have a right to be respected as being unwell.
If you do this, it feeds into the idea that people with M.E are out to get researchers. You risk actually putting others off in case they put a foot out of line and also have their lives dug into.
Ad hominems are made by people who are losing a debate. Don't play that game. Very disappointed the charities aren't putting out a clearer message about this to prevent harm being done.