US SOCOM deployments

[thid92]

I have seen a few soldiers returning from deployment in Afghanistan wearing the SOCOM patch, I question it because it's only a few out of the entire brigade that went wearing them. They claim they were attached doing logistics for SOCOM. Is this legit or are they taking it upon them selves to wear a patch the have seen the SF guys wear thinking they are authorized to wear it? If someone in the know can shed some light on the situation so I can call them out if they are not entitled to wear them.