I think the legal aid he refers to is for when they come knocking on your door with proof you ordered cannabis seeds. Perhaps many small guys are not worth the time but many addresses were out there for who knows how long. One quick script and all of the information could be captured and saved long before it was cleared out of Google's cache.
Email addresses, phone number, physical addresses, and sometimes even real names were revealed, right there in search form. You did not even have to follow the link, there was enough there on google's pages. I was able to pull up at least 6 buyers, even earlier today. Most were in areas that cannabis possession in any form is illegal.