[donpinkus]

So, can I use React as my company's front end framework or not?

If I do use React, what is the specific legal risk (if any)?

PLEASE no emotionally charged comments - I just want a clear answer from someone who deeply understands the legal stuff.

[gramstrong]

You most likely certainly can with nothing to worry about. 99.99% of the world's developers will never need to sue Facebook for patent infringement. That is, unless Facebook begins reverse patent-trolling. But I see it as more of a decision on ethics at this point in time, and don't really see any reason to feel particularly threatened.