Take a poll to see what people think. IME, the majority do not want to check it during the conversation - they usual flow is they'll move on to other topics.

I'm not sure why the email thing is malicious or arrogant. It's the equivalent of saying it in person the next time you all meet: "Hey, remember we were talking about X last time? I looked into it and ..."

But your reaction emphasizes the point: People will jump to conclusions about your motives.