Advice for Danny whenever you play Dodgeball, this is how I always do it:
When I join the server and I see that there is stealing going on, I stay a round in spectate. In free-cam mode it is waay easier to see everything; you just follow the rocket and the stealers will come to you. Additionally, make a copy or a bind of "@@@ General reminder that rocket stealing is forbidden" and say it at the beginning of each round - for those who don't know, the @@@ makes it appear in the centre of everybody's screen. No way there is an excuse for not seeing that.
You have just efficiently warned and punished every stealer in the server within the first two rounds of you joining. Now just join a team and play with them, it is now much easier to spot the maybe two stealers who are still doing it. And even if not, just join spec to solve the problem and join back and respawn yourself. Don't let your Admin position block you from actually playing the game, too.