Is it legal to use Tornado Cash?

Can you clarify the legality of using Tornado Cash? As a cryptocurrency enthusiast, I'm interested in understanding if it's a viable option for maintaining privacy in transactions, but I'm also mindful of potential legal implications. Could you elaborate on any regulations or restrictions that may apply to its usage, and any potential consequences for those who choose to utilize it? Additionally, is there any guidance available for staying compliant with relevant laws while still leveraging the benefits of decentralized finance tools like Tornado Cash?