As I understand it the LEILA system ("LEIstungs Limit Anzeige" or Power Limit Indicator) for QO-100 is ground based and will just generate a siren to remind users to decrease their uplink power. That would be similar to the space-based AO-40 system and in those days we didn't have such easy access to spectrum and waterfall displays.
I don't believe that it's operational at the moment, but if it is then it's rather forgiving sometimes.
Chris