How can I answer these questions below while also relating to the article down below?

Here is the name of the article: "Keep It Clean: Social Media Screenings Gain in Popularity"

1. Should employers use personal social media as a screening tool? Why or why not? There is no current legal precedent, but is there an ethical issue for employers today?
2. How does the use of Facebook and social media affect the likelihood of discrimination on protected grounds?
3. Does the knowledge that future employers might be looking at your Facebook page and social media accounts change the type of information you are likely to post there?