> The fact is in spite of the heavy retweeting, although it gained the attention of people for a short time, its actual impact is not much more than #MUSICmonday or #Followfriday

Normally yes, but in this case it nudged other news outlets such as the BBC to report on the story and prompted a debate in Parliament on if these gag orders are too easy to abuse. I would say that's some positive outcome, even if it does little to help those who were affected by the toxic waste.