No farmer is forced to buy seed from Monsanto. I would expect a comment like this on the Daily Kos.
That is not exactly correct. Going from memory. Monsanto owns the copyright, patent to the DNA of the seeds it develops. If by chance that DNA gets into a farmers field (not at all unlikely) then Monsanto sues the farmer for copyright/patent infringement. The above can easily happen if a non GMO crop is in close proximity to a GMO crop. So the farmer thru not fault of his own is forced to pay Monsanto even tho he planted his own seeds saved from a previous non GMO crop.