I have no idea why people on TSR treat online petitions as some kind of gold standard for doing something. I can't think of anything less effective.
When leaders from countries with poor human rights records visit, they will normally be accompanied by protests from those who hold left-wing views.
Whereas many of the right will happily turn a blind eye to lot of **** as long as you wave enough money in their faces (see Cameron performing like a trained dog for the Chinese and Saudis).