The effect of social media use on job candidates

So our earlier poll got over 500 responses, and overall, I would say the news is not good for job seekers on social media, such as blogs, twitter, Instagram etc:

Faculty involved in hiring: has the social media presence (blogs, twitter, Facebook, Instagram etc.) of a job candidate affected that candidates prospects at your institution?
Yes, usually in a negative way.    14%72 Yes, usually in a positive way.    4%21 Yes, sometimes positive, sometimes negative    17%91 Rarely, but usually in a negative way.    16%83 Rarely, but usually in a positive way.    6%32 No, never in my experience.    44%234

More than half the respondents--56%, or about 300--report that the social media presence of job candidates has affected their job prospects.  And more than half of those reported the effect was usually negative, with another third saying "sometimes positive, sometimes negative."

On the positive side, a bit more than half reported that social media use either had no impact or a positive one.

It might be interesting if faculty who responded to the poll could say a bit about the kinds of things they have seen on social media that have helped and/or hurt candidates.