Hi there,
Ads are not personally chosen by CS staff. They are provided by Google, and there is not much screening that can be done before hand (except for obviously 18+ ads). That being said, wr can remove specific ads. Please send a help ticket with your concern. It would be particularly helpful if you could grab a link to the website if you happen to see the ad again.
Thank you for looking out for CS and wanting to keep it a welcoming space!