This is called censorship, the very thing Bitcoin was created to circumvent.
It's an especially big problem given the fact that the vast majority of lightning payments are routed through lightning nodes operated by centralized cryptocurrency exchanges. Most of the remaining nodes on the lightning network are unreliable due to shortcomings in the lightning protocol surrounding state management, node connectivity, and inbound/outbound liquidity. That's not even getting into the abysmal incentive structure node operators face.