When you load the NY Times website, you use up their resources (hosting, delivery, etc) and they're paying some fee to give you the privilege of viewing that page.
They pay for that using ads. Their choice.
You don't like that? Great. Stop visiting that website. That's your prerogative. But to visit the website, use their resources, AND block their way of generating revenue to pay for that...well, that's both immoral and wrong.