I'm on a private tracker where Tixati is banned on account of it supposedly permits ratio cheating by misreporting upload stats to the tracker and this has apparently been possible in Tixati since at least 2012. Could the devs please eliminate this option in Tixati?

Tixati does not manipulate Ratios, tell your admins to properly test the client because that issue has been solved more than 6 years ago.

Goddamn private trackers, lazy bastards don't even test stuff properly.

Check this thread first where ZarkBit claims those issues have been fixed many years ago:
https://forum.tixati.com/support/3868
https://forum.tixati.com/support/2388

The tracker admins should provide any substantial information so these (outdated) reports can be followed upon.

Further reading:
https://forum.tixati.com/support/174
https://forum.tixati.com/support/7028

"Ratio cheating" is only cheating if it does so intentionally. Tixati does not have any ratio cheating features. And unlike libtorrent, Transmission, qBittorrent, BiglyBT, rtorrent (open source projects) - you can't just change a single line of code to multiply ratio by +10% with Tixati.

Is much better Tixati add a global and percistent "useragent" setting, so we can solve all this ban issues, only it can really unblock Tixati in all idiot trackers.

As far as I know Tixati does not have a ratio cheating option, but it does have an option known as "spoofing" which in many trackers is not tolerated (as it allows a client to say that it is another client to the tracker)

Spoofing is the solution, not the issue, if Tixati is identified fakely as uTorrent how can the tracker know that the client is Tixati and block it? I don't use private trackers, but a global spoofing is the best solution, because you can't change the mind and opinion of ALL private trackers in the world, NEVER! Just use the uTorrent ID and are done!