It's well known a16z guys will immediate ban anyone on Twitter the moment for ... anything. I am not talking of trolling, abuse -- just polite disagreement, instant ban. Never seen any other organization doing similar and so consistently.
Especially ironic considering that it was geared towards India's decision to ban Facebook's "free internet". A decision, which looks in hindsight, extremely smart.
[1] https://money.cnn.com/2016/02/10/technology/marc-andreessen-...
edit : clarify