Don't wait until you are certain.

Dear NSPCC,
Inspired by your tv campaign, I would like to report several cases of what can only be child abuse.
I'd like you to investigate some large organisations, masquerading as charities. They distribute pills to kill children-usually with the collusion of Doctors,nurses and health professionals. Maybe your own G.P., midwife and Health Vistor support this abuse of vulnerable children?
This is a very widespread problem, I am surprised you haven't picked up on it already. I guess you are busy.
There are places all over the country, where you can have your child murdered, and the body disposed of, so nobody ever knows. Isn't this horrifying? This is why I'm writing to you with such urgency.Did you know these children are attacked with sharp knives? Some are abused with something similar to a vacuum cleaner. They are torn apart by it.
I assume you are used to horrifying descriptions of abuse, I have to admit, I find such descriptions horrifying, I can barely pen this letter.
There are huge attacks going on against infants with disabilities. I have a son with Down's Syndrome. As soon as I found  these attacks were aimed against children like him, I had to write. Did you know children with Down's Syndrome are being deliberately hunted down and then, in most cases murdered!? Many of these dead, abused infants, then undergo a macabre ceremony, whereby their hand and footprints are taken, along with someother "souvenirs". I shudder at the thought-it makes me never want to leave my house!
So I am writing you this letter. I hope you will be successful in your investigations, and put an end to this terrible child abuse,
Thanks,
Yours Sincerely,

A concerned member of public.