Recruiting via social networks has become an essential HR practice, with 92 percent of U.S. companies using social networks and media to find talent in 2012, up from 78 percent five years ago, according to Jobvite’s annual Social Recruiting Survey.

The survey results show that LinkedIn continues to be a dominant recruiting network, while Facebook and Twitter have seen major adoption growth in the past year. Two-thirds of companies now recruit through Facebook and more than half (54 percent) use Twitter to find new talent, Jobvite says. It also finds that employers scrutinize social media activity, noting more than half of respondents would have a negative reaction to seeing a spelling or grammar mistake in a social profile.

Conducted in June, the survey polled more than 1,000 human resources and recruitment professionals on their social recruiting activities and intentions. Now in its fifth year, the survey has revealed social recruiting usage trends since 2008, providing insights into how popular it has become, who is using it effectively and the results social recruiting produces.

Jobvite asked for reactions to various types of profile content to see what recruiters like and don’t like to see: 80 percent of respondents reacted positively to seeing memberships to professional organizations, while two-thirds like to see volunteering or donating to a nonprofit.

Content that recruiters especially frown on includes references to using illegal drugs (78 percent negative) and posts of a sexual nature (67 percent negative). Profanity in posts and tweets garnered a 61 percent negative reaction, and almost half (47 percent) reacted negatively to posts about alcohol consumption.