Can Postings on Facebook Affect Chances of Getting Accepted?
Although a lot of people, both young and old, don't seem to "get it", the fact is that Facebook postings are, to a large degree, public property. How do you want to be perceived?
Although every single admissions officer is not going to have the time or inclination to check a student's Facebook page, be aware that there is every possibility that admissions personnel might want to know more about an applicant based on information included on his/her application or in the essays which the student has submitted and could well choose to view the student's Facebook entries.
Colleges/universities want to admit students who will reflect well on their institutions, both while the students are at their schools and after they graduate. If what you are posting or are permitting other people to post about you on Facebook shows lack of control and poor judgement, it is quite likely that those postings could affect your chances of acceptance.
No matter how successfully you have performed in high school, no matter how well you've done on standardized testing, no matter how outstanding you are as an athlete, musician, etc., there will always be other applicants who have equally outstanding qualities, but who have used more common sense with regard to Facebook entries. Those applicants will have the advantage.
Again, how do you want to be perceived?