My work's got one of those. It's an app on the company Slack called Donut that runs a "Watercooler Chats" channel. You can imagine the kinds of questions and revealing responses that thing sucks up like coke through a hundred dollar bill.
I don't think you necessarily had ill intent, but this kind of question will get some resistance because often, obscure = specific. Eg 30 seconds of internetting says that was [redacted].
Whether that's enough anonymity is up to you, but for many here it won't be.