We all know that companies like Adobe, Amazon, Google, Zuckerbot products and M$ are everything, but trustworthy when it comes to security and privacy. But too many times FOSS is confused with being reliable, secure and private, which is profoundly false, especially in recent years, since precisely the aforementioned companies got massively into the world of OpenSource, injecting and controlling many FOSS products with their APIs.
The big evil today is called surveillance advertising, that is, selling user data to advertising companies and others, to create income, which is not only an invasive privacy problem, but also a serious security problem as it is not controllable how these data, often sensitive, are processed and protected.
Especially in products from the US, where privacy regulation is practically non-existent and which require an urgent review in this regard, irrelevant if it is FOSS or proprietary soft. It also requires a revision of the definition of OpenSource, where products that send data to third parties and large companies are not really Open Source, other than in an evil sense..