You can use an automated (customisable) tool at saveyourinternet.eu to do this too.
I wrote to them last time this was voted on and expected zero replies (partly due to the late hour), but actually got 2 out of 13, one of which indicated they had actually taken a few seconds to read some of my words. I later read they had received "thousands" of messages on the subject. I can't imagine most of them getting anything close to even this small amount of attention.
The templates might be tedious, but they are there for people who would otherwise post some random flame or rant. Pages encouraging phone calls have scripted templates on them too.