http://searchengineland.com/lawyers-sue-seo-firm-violating-google-guidelines-192492
I could see nothing hurting the SEO industry more than being opened up to liability if any SEO technique goes South. What is required to rank well one day may get a site banned the next.
Cat and Pigeons....
If the outcome is that firms better inform clients of risk then that part isn't bad. Nothing wrong with people being better informed. I doubt that will be how it goes down though.