Stories of people sawing up assault rifles or handing them to police have been widely shared on social media.
BBC News education reporter
MPs launch an inquiry into the impact of social media and screen-use on young people's health.
A student who created a slideshow presentation on Tinder shows how humour is key to his dating success.
Jesy Nelson has been accused of cultural borrowing after unveiling a dreadlock hairstyle on Instagram.
Nyle DiMarco shares his frustrations as a deaf cinema-goer and hits a nerve with others hard of hearing.
Ex Black Eyed Peas singer's performance before annual basketball match-up did not impress everyone.
The US president says the agency is "spending too much time trying to prove" Russia-Trump ties.
Survivors of Wednesday's shooting demand tighter gun controls, criticising President Donald Trump.
The earth shook on Saturday in England and Wales but most people took it in their stride.