You’re right to a degree. If there’s demand for something, people will find a way to do it. There’s a huge incentive to steal: it’s 100% profit. People use all kinds of tools and services to protect their property, but a skilled and determined thief can still get through. Does that stop people from building fences, buying vaults, or paying for home security?

That’s why filters while not perfect are still useful. They’ve never been a silver bullet against spam, in Bitcoin or anywhere else. But with regular upkeep, they’re good enough. What matters most is the will to fight spam, not surrender to it. I’m not trying to block every last piece of spam - just enough to make a difference. The more, the better.