"Of particular concern to gun owners, hunters and shooting sports aficionados however, is the fact that reportedly, any posted pictures containing firearms will flag an applicant as ‘Demonstrating potentially violent behavior’"
What???? This is like saying someone with a picture of a car is more likely to run you over. Or like saying a picture of a person with a pitbull is more likely to sic his dog on you. No one should be judged simply from a photo because it is difficult to determine the context in which the picture is taken. On the other hand I am not necessarily opposed to companies researching what you post on-online. So long as they use it to ask questions in the interviews and avoid making assumptions. Companies have a right to know who they are hiring and individuals/applicants are putting the information out there for everyone to see.