I think generally when people respond with COL they are attempting to make themselves feel better about their life's insecurities. --- Such as the fact they don't live in SF or make that much. Best to ignore it, or state that the COL around SF is not as high, such as in Fremont.
"Kotaku points out that the PasteBin list is similar to one from a few months back. The dump contained credentials for people working at Universal Music Group. Add to that the fact that the suspected hacker gets the number of PSN accounts wrong, and you have a troll trying to get a rile out of people." via http://www.zdnet.com/anonymous-says-it-hacked-10m-psn-accoun...