I've seen a lot of posts on Facebook lately linking to various blogs and "news" sites mentioning that Monsanto purchased and/or hired Blackwater (aka Xe - search for "Monsanto Blackwater" with your favorite search engine for dozens of sites). As far as I could find, they all link to this post, which makes a lot of assumptions and has few sources to back up many of the claims (such as "Gates is also engaged in trying to destroy rural farming worldwide", etc.), however this bit (with sources) is interesting:
Xe (now Academi) has, indeed, been purchased, and while there’s no way of DOCUMENTING who the new owners really are, the logical conclusion would be that Monsanto, who had been employing them prior to the sale are the new owners. This, of course, would also make sense of the secrecy surrounding the deal and the identity of the new owners. The company was bought out by private investors via private equity companies that don’t have to divulge any of their dealings, with Bank of America providing much of the $200 million in financing for the deal.
This post refutes that Monsanto actually made any such acquisition, but I can't vouch for the validity of any of the sources here, here and here. Otherwise, Monsanto has denied hiring them in an 2010 article on their website which states:
Monsanto did not hire Blackwater nor did we approve of the firm infiltrating any groups as was suggested in the Nation article.