I cannot speak for how desperate the media in the the US is but in the UK they have started using twitter quotes as news stories because the far left hates them so much and wants the general public to think the same way.
As for "security agencies" they could find everything you ever posted online at their leisure. It's a trivial exercise for them to retrieve everything stored on your phone, think your Facebook messenger messages are secure because their encrypted think again Facebook has the keys.
Bookmarks