@TechConnectify Things like mutes/blocks are negative signals that could be used, but those are only available within a given server, so your servers filter could only use mutes and blocks by other users on your server as a form of input. I suppose that there might be enough data on larger servers for this to be reasonable.
Anyhow, it's an interesting problem, but I imagine it would take quite an effort to build something that would be useful.
@TechConnectify Next question is who would work on or fund such an effort? At some point, you need someone to actually hire folks to work on this, or have someone with free time and an itch to scratch to sit down and do it. I feel like many of the folks impacted by this (larger accounts, or accounts more likely to receive harassment), aren't necessarily the ones who would have time and skills to work on it.