The poster said the authorities should be told about children who had tools used by cyber-security experts.
No 10 is urged not to pick fight with broadcaster amid reports it wants it "massively pruned back".
The South Korean thriller saw a 234% increase in US ticket sales since winning best picture.
Hamas militants hacked dozens of smartphones by posing as female admirers, Israel's military says.
Nikita Pearl Waligwa had been diagnosed with a brain tumour and died in Uganda at the age of 15.
A buyout collapsed, leading to the app closing and a presenter paying for final game's $5 prize.
Trading standards officers are probing the products, which Amazon has now removed from sale.
Starring Jarvis Cocker, Stormzy, Adele, John Prescott and current host Jack Whitehall.
Levels of electrical and electronic waste are expected to more than double by 2050, according to the UN.
The BBC meets the medics and lawyers across America who are using the app to help educate the public.