Scattering spores is cool and people print shirts and what not to create spore trails. Wouldn't bet on finding a patch created by said spores tho.
Even tonnage of spores? If 2 pounds contains approx. 1 trillion, then a ton is about a quadrillion spores. If a successful bed is about as likely as winning the lottery, then this seems to be the way to buy the most tickets. Putting some on our shirts is a nice conversation starter, but I'm talking industrial-level spore production.
If a grow rooom were set up with a system where the air being recirculated is forced through a chamber where a fine vegetable oil or water or some appropriate liquid was misted into the air to scrub the spores out, and the mushrooms in the room were allowed to fully sporulate (rather than be harvested as for food), a huge mass of spores could be harvested. Scrubbing particulates from air with water like this is a well established air cleaning technology, so it would likely work. Using oil to grab the spores would result in better chances for colonies, I think, because the viscosity of the oil droplets when ejected into the air (from my balloon!) would hold small clumps of spores together rather than their falling individually. This gives a better chance for successful mating, and I think this method gives the greatest chance of success vs. effort expended for forest-sized applications.
the chances of someone knowing how to clone or start from wild spores and end up with dowel spawn will probably not be just going outside and pick just any mushie.
not. But probably isn't good enough. One guy doing this wrong would set back mycology as remediatory technology for a long time, as laws and new regs were enacted to prevent it happening again (and making what we are proposing here illegal, not to mention the horrible PR fallout). Assuming competence is never a safe bet; kudzu looked good to smart people as an erosion control measure (oops). The jerk in New York or wherever who was working with gypsy moths to find a new source of silk thought his few little harmless moths were under control (they weren't). Lists like this can get real long real fast, and in almost every instance everything seemed fine at first. Assuming we are all much smarter and more aware and able to forestall these unintended consequences is a nice way to shit the bed again.
Before I go scattering something far and wide in the natural world, which is arguably been messed with a lot already, I want to be very very very sure that I am not going to be making things worse, that's all.