The AP said in June that Homeland Security was planning to expand its social media collection, but there haven't been details until now.

There have been numerous objections to Homeland Security's practices, particularly since the visa requirements took effect in May. It's not clear just how investigators conduct searches, or what they're specifically looking for. There have also been multiple instances of questionable decisions, such as a Harvard student who was denied a visa based on his friends' posts, not his own (he's since been cleared). There are concerns that authorities might either make bad judgment calls or abuse the requirements to reject people based on thin pretexts.