Just a reminder that a great spam mitigation mechanism is the sender stakes the message, and the recipient has the option to slash and delete the stake 

Will repeat every time I get a spam message

The only problem is externality pricing.

Building https://negationgame.com

You would slash someone for dming you if they disagree with you on something?

Would you say it’s currenlty a problem that ppl report others for benign messages just based on their ideological differences?

I wouldn’t personally. But on a bigger scale: Yes, I think this is what a great number of people would do.