Your link is just an internet rant by David Theodoropoulos, a seed dealer who has been heavily criticized for ignoring noxious weed laws among other things. Basically, he believes he has the right to ship the seeds from any plant anywhere he pleases, regardless of the law. The most amusing thing about it is that the vast majority of papers cited his "Literature Cited" section actually document the damage caused by invasive species. You'd be better off reading the papers themselves rather than trusting his bizarro world interpretation of them.
