If Odo had done what Rom had attempted to do while the station was still under Dominion rule, would they still have arrested him and sentence him to execution? I personally think that the Female Shifter would have found an excuse to let him go. I mean, with the way Wayoun worshiped him and the way the Founder kept trying to return him to the Great Link, I couldn't imagine them killing Odo. The saying goes, "No Changeling has ever harmed another." At the same time, I'm sure there are exceptions.