Informing someone about something advised against is fine, but please, do so respectfully. Women at the mosque judge and gossip amongst themselves. This mentality can be intimidating and discourage Muslims from wanting to engage with their religious community. Imagine being the reason that someone doesn’t regularly attend the mosque for fear of being mocked and ostracised.
Furthermore, please be mindful of your actions toward Muslims who are outside of your clique and race. Community is such a crucial part of Islam. And older generations, such as your own, who think that it’s okay to impose your own beliefs on other Muslims, are creating a division. Also, stop thinking someone can’t suggest ideas for improvement for the benefit of the community just because they’re not a part of the mosque’s committee board.