RMT exists because there is a market for it. To remove RMT means to remove that 'market'. Theoretically it is possible, but practically it is near impossible.

Just like how the Japanese anti-piracy campaign is trying to rid of manga/anime rips. There are still countless sites providing ripped content, does that mean that anti-piracy campaign does not care and is doing nothing? No. Police are roaming the streets, yet crime is ever increasing every year.

RMT sucks, don't get me wrong. But putting all the blame on the host does not change the underlying fact, RMT exists because people who require the services exist. Unless you are able to change this, nothing will change. It's just building a wall with holes on each side.
What you may attempt to do with your solution may or may not work. Most likely it won't change much. But at the end of the day, if RMT spams still linger, does that mean that you stopped caring or just did nothing? No, you cared, you tried, but you unfortunately lost. Same thing for the devs.

Don't try to blame everything on others and pretend they don't care, that's just selfish and rude.