Background check

Read the passage below and answer the questions in detail. please answer in essay format

“Bosses are now using the popular social networking site as a tool to double check how likely it would be that their new worker would take a sick day for being hungover or on drugs the night before.

And job seekers were being found out for lying about their qualifications, with employers checking their Facebook pages to see if their online details matched their resume.

One in 10 were knocked back for boasting about drinking and drugs online, 13 per cent were vetoed for making racist comments and nine per cent were overlooked for placing racy photos on their Facebook page.” —The Telegraph, UK

Do you think that it is appropriate for employers to research applicants’ background through social media such as facebook and instagram? What about credit histories? Substantiate your answer.