Is it wise for managers to evaluate a promising candidate's tweets or postings on social media sites as grounds for rejection before even interviewing him or her? What might be some ethical and legal issues for managers to consider? What is your take on this answer?

I think it is wise for an employer to check an applicant's social media. Apart from reviewing only the resume, employers can review their social media profile, their interest, etc. and link those to theskills and talentsthe applicant has for that particular job. This is basically an extensive background check before hiring them. Since there is no law or act restricting businesses from doing a social media screening on an applicant then it is technically legal. But, this is very unethical mainly due to the fact that you aren't giving them a chance to prove their worth and abilities. Rather they make biased decisions off an app that enables free speech and expression. At least see the candidate for a face-to-face interview before judging them. Then if they do not fit in then look for another applicant. Lastly, for the applicants to get hired. They must regularly watch and monitor what they say regularly because everyone is watching you. It is best you create a professional website or profile for future employers to see. For example, make a Linkedin account.