Think you can get away with leaving coffee in the sink, or smoking in front of a non-smoker? Maybe. But according to a new study, even if coworkers don't say anything about such rude behaviors, they are likely to harbor resentment about it.



Through an informal online survey with Yahoo! and Survey Monkey, researchers at the Civility Initiative at The Johns Hopkins University and the Jacob France Institute of the University of Baltimore identified workplace behaviors that irritate people the most.



More than 600 workers and college students in the Baltimore area ranked bad behavior on a scale ranging from 1 (not offensive) to 5 (most offensive).



The 'Terrible 10' List

Based on those rankings, the "Terrible 10" behaviors are (from most to least offensive):



1.Employment discrimination.

2.Erratic/aggressive driving that endangers others.

3.Taking credit for someone else's work.

4.Treating service providers as inferiors.

5.Mocking race, gender, age, disabilities, sexual orientation, or religion.

6.Children who behave aggressively or who bully others.

7.Littering.

8.Misusing handicapped privileges.

9.Smoking in non-smoking places or smoking in front of non-smokers without asking.

10.Using cell phones or text-messaging in mid-conversation or during an appointment or meeting.



Some actions, such as discrimination, may be illegal; but even more subtle behaviors, such as making a sexist joke or not asking before lighting a cigarette, still add to the stress of the daily grind and can actually lower productivity.

"The research suggests that people are bothered more by the transgressions of coworkers and strangers than by those of family and friends," says P.M. Forni, director of the Civility Initiative at Johns Hopkins.



Civility Helps the Bottom Line

Forni added that, although the survey did not explore the prevalence of these behaviors, years of anecdotal evidence suggest that taking credit for another's work, and text-messaging or cell-phone use during meetings are widespread annoyances.



"These behaviors have a big impact on the quality of life for coworkers and on the bottom line as well," Forni tells Yahoo! HotJobs. "If we had better relationship skills, it would diminish the amount of stress in the workplace and eliminate a lot of misery."



The survey is backed up by increasing evidence that shows workplace rudeness taking a toll on both employees and on a company's bottom line. A previous study of rudeness in the workplace by the Jacob France Institute found that 67% of respondents feel society is ruder than in the past, and 83% stated that it was "very important" for them to work in a civil workplace environment.