"mostly" Monsanto? Or is that just an older, famous example? Lots of companies sell seeds in mass quantities -- are you saying none of them sell GMO seeds?
In this case, Monsanto never sold "terminator" seeds. They (and many others) sold hybrid seeds, which don't breed true, and so are functionally equivalent to that. Hybrid seeds have been around since the 1930s, if not earlier.
In any case, they can get the same effect by contract. You were not allowed to replant Roundup Ready soybeans, and they sued (and won against) farmers who broke the contract to do that.
If the courts cannot see the distinction between farmers and plants violating patents, then the Congress may amend the law to oblige them to see it.
I don’t avoid GMO foods, but I do think our current scheme incentivizes finding the strongest poison and correcting the plant to resist it, without concern for how that poison affects the rest of the environment. I would much rather we engineer the plant to resist the disease directly, but it’s harder to double dip on profits (RoundUp and RoundUp Ready) in that scheme.
personal spite is misplaced, and ignorant actually.