You can't guarantee everyone else will use a neutered model.
I've joined TAC, but still have to dance around it.
In this case, you can put whatever you want between the harness you're running (or modify the harness itself), and essentially "lie" to the model. Any verification technique would be fairly trivial to bypass, while you continue to run the harness locally.
Have personally tested this with Opus and Sol and it works.
Classifiers are tricky though. Here's where open weights will win.