They check social media and might even demand access to your email. The latter happened to an acquaintance of mine who wanted to do a 1-month internship at a un

They check social media and might even demand access to your email. The latter happened to an acquaintance of mine who wanted to do a 1-month internship at a university for a project but was only able to get a tourist visa. At the airport in the US the border guards got suspicious, demanded access to her laptop and when they found an email about the internship, she was put on a flight back to the netherlands immediately.