Interesting petition. I do wish whoever wrote it had consulted a little before putting it up - the wording of the plebiscite they are requesting could have been better. This isn't supposed to be unduly critical, but if we were to get anywhere near a plebiscite, you KNOW that politicians would try to undermine it by putting up a question that would split the pro-reform forces. E.g.: mentioning only sativa and not indica, mentioning the 'herb' and not edibles or other derivative products.
Of course, as a strategic move that is designed to split those who think that legalisation can only ever happen via a Colorado-style market solution, it might be worthwhile.