Yes there is reason to think so: Short term profit is what drives modern corporations like Monsanto, and short term profit planning has nothing to do with "fear-mongering.
For me, the simplest way to explain how untrustworthy Monsanto is: Look at the success of the Phillip Morris Corp.They had a product that they recognized as a danger to user's health in the early 60s/late 50s. Instead of notifying the public they tripled down on advertising and marketing to new markets: women, young adults and foreign countries. They made a massive fortune from it and expanded into the world. By the time the science caught up with them they had divested of tobacco and bought into the global food market. While they still have some cigarette brands, the greatest part of the money went overseas to support their buyin to other things. They paid out some small penalties, but nothing close to what smokers paid out in health costs resulting from smoking addictions.
No, Monsanto has nothing to fear.