Ask HN: What's your stand about react.js patent clause?

I have started using react.js + flux and I really like them. But I wanted to check what is your stand about the patents clause. Are you using it for your startup or are you steering clear? Also if you are a consultant/freelancer, are you using it for your client's project?

I fall in the second category and I am not sure what should be the things that I need to consider before I start using it for my client's work?