Okay maybe I'm missing something but what prevents the censoring country from obtaining Telex station equipment and placing it on outbound links diverting Telex

Okay maybe I'm missing something but what prevents the censoring country from obtaining Telex station equipment and placing it on outbound links diverting Telex traffic before it makes it to the outside. Censoring country cab then block/tamper with the results and know that you have illegal Telex software. Signing your traffic doesn't seem to do much for deniability when the man shows up at your door.