I have been involved in a number of campaigns at a local level over the years (against the closure of certain facilities, against certain proposed developments - that kind of thing)

There is a piece of "accepted wisdom" in campaigning circles here in the UK which goes something like this:

- One individually-written letter is worth ten form letters

- One form letter is worth ten signatures on a petition

Not everybody will have time to write to FB with their own thoughts, but I would strongly recommend that those who do have time to spare write their own letters to KLM in addition to signing the petition.