The laws your links were about appear to address doing business in foreign currencies, with dollars being used in those particular cases. NameCheap already did business in dollars, so why do you think adding Bitcoins presents an additional problem? As long as they're not forcing you to use Bitcoins or dollars for payment, I have a hard time imagining any country getting its knickers in a twist.
Like I said, obviously you should do what you think is best for your business. I just don't think it's fair to imply that NameCheap are forcing liability on people without hard evidence.
I pasted the law and even a case to some other replies, I wouldn't just throw that if it wasn't true.