The university article sounds like it is coming from a legal perspective rather than an ethical one (although I know it is claiming ethics). At this point it's pretty common knowledge that anyone can google anyone they want and are within their rights - the Internet is public space, not personal. Sitting outside someone's house is a big difference since this becomes physical personal space, where the Internet is virtual. Is it wise for a T to google or Facebook stalk clients? Unless they're not concerned with the possibility of curiosity being misintetpreted or a complaint being filed, then no, it's not very smart. But to go so far as to call a simple google search an ethical violation is taking things a bit too far. I have a T and couldn't care less if she ever googled me or looked up my profile on Facebook. Aside from some picture of my kids, I keep most of my stuff locked for only friends to see anyway. And as a future T, I see no reason to feel the need to avoid social media altogether any more than other professionals.

That being said, a line is being crossed when Ts start friend requesting or following clients. From what I've learned, this is considered an ethical violation- mostly due to the potential dual relationship as well as confidentiality issues that could arise. LinkedIn invites, Facebook friend requests, following on Twitter or elsewhere, contacting on dating sites, etc., all should not be initiated by a therapist.