You shall not covet your neighbor’s house… nor anything that is your neighbor’s. This principle undoubtedly extends to honors. Making a big stink would be more shameful than the intentional stealing of an “honor”. Hashem will value your respective contributions accurately. However if the thief is a repeat offender I would offer him a strong mussar schmooze. And if that were the case I would hope the Gabbai counsels the offender accordingly before offering him another honor.
