However, they'll have to look hard for the sober photos. According to The Daily, adult Facebook users said they were under the influence of alcohol in 75 percent of photos they were tagged in.

4) Spelling/grammar errors in posts/tweets

Surprisingly, 54 percent of recruiters want you to check your spelling and grammar before you send a tweet.

Poor spelling and grammar is a consistent problem that employers have recently noticed. According to another survey from the Society for Human Resource Management and AARP, 51 percent of organizations indicated that writing in English (grammar, spelling, etc.) was the top basic skills gap observed between younger and older workers.

Any time a potential recruit is writing something that's public, it pays to double check. eHow contributor Amy Cox offers three programs that can review your grammar and spelling:

• White Smoke
• Style Writer
• Grammarly

3) Profanity in posts/tweets

Sixty-one percent of HR and recruiting pros want potential hires to clean up their dirty mouths.

Depending on the culture of the workplace, profanity may or may not be acceptable among colleagues. But many social media users falsely believe what they do with their personal page won't reflect on who they are professionally.

And, according to Reppler, a social media monitoring service that helps people manage their online image, a lot of people like to cuss online. The firm did a survey last year of 30,000 users and found 47 percent have profanity on their Facebook wall.

A blog post from the company advises, "Any use of profanity or offensive language will reflect negatively upon you, so avoid status updates and comments that could be interpreted as racist, sexist, criminal or discriminatory in any way (even if you assume that no one would take it seriously…someone could, and that someone shouldacoulda been your boss.)"

2) Posts/tweets of a sexual nature

Certainly, a racy photo or tweet may jeopardize a current position. But are they forgiven before you get the job? According to 66 percent of HR and recruiting professionals, they aren't.

A good rule of thumb for this: If it will get you fired, it won't get you hired. Just check out Mashable's 10 People Who Lost Jobs Over Social Media Mistakes.

1) References to doing illegal drugs

Illegal is illegal. And clearly, HR doesn't look the other way.

A majority (78 percent) of recruiters don't like to see illegal substances mentioned or pictured anywhere near your social media profiles. It probably won't bode well if they drug test, too.