With respect, this is not only a bad idea, but antithetical to Itch.io's purpose.
There are plenty of porn games on this platform I find distasteful, some of them I even think are wrong to make. But Itch facilitates these games because beyond a basic code of ethics, it is meant to be an open marketplace where anyone can distribute their game. Democratizing games is the goal.
It's reasonable to me that you should have the right to filter out content you don't want to see. It is not, however, reasonable to eradicate content you don't want to see. Banning porn games on Itch would remove vast swathes of queer art, and historically, porn bans have been used to do just that.
Advocate for better content filtering, not abolishing content you don't like.