To build an anti-cheat you need resources and help from people who are into coding for a living, literally lol.
The trackbase community is pretty big and gathers players from jaymod, as well as noquarter, etpub/silent, etpro, and so on. Not to mention many people donate money to keep it up. Something could be attempted to be done if the TB staff members themselves supported the idea. A sort of "trackbase anti-cheat" (tbac LOL!) isn't a totally absurd idea if it's done with the right intentions and resources. But even with total dedication it would take a lot of time to make it from scratch. If this hypotetical (and I repeat, hypotetical) trackbase anti-cheat for "fun"-mods was to be developed in collaboration with tzac, for example, you'd already have the backbone for a good anti-cheat.

Again that's just a thought. Maybe I'm going too far.