If police use the lack of information from those avenues as a justification for a warrant to conduct surveillance then that argument is moot.

Are you privy to any warrants actually being issued solely because the police couldn't turn up info on a suspect via Facebook or Google? Maybe I'm ignorant, but I don't think that's a thing that actually happens.

Although reputation and behavior has a role in the decision other factors would need to be in play. I meant more that no social media could be seen as anti social by a judge and added to the list of things that ultimately satisfies probable cause.