I’m not sure that Googlebowling has been proven to be an effective way of hurting another site’s results. The author of the article didn’t point to an example. It’s possible that Google does exactly what the author suggests, and simply ignores those links.
I believe there was a thread at SEOChat or one of the other SEO forums where they were actually trying to Googlebowl one of their own sites to determine whether or not this was something that could actually be done. Last time I saw it, there weren’t conclusive results yet, but if someone has seen that discussion over there, and knows whether or not they came to a conclusion, I’d be interested in seeing the info.
I may even try to find that discussion myself tomorrow if I have time.