Forum is full of sensitive snowflakes. Just read the posts and move on, or engage the poster and give them some shit. Fan the flames a bit, nothing much else to do until things return to normal. Last I checked, this is just the internet and the Matrix was a sci-fi movie. It's not real.
Recently somebody on here had a similar warning. A tech savvy board member pointed to the forum protocol and something to do with the difference between http and HTTPS and certificates. I have no clue about it and can't find the post now. I would look into your browser settings, possibly an option to allow the forum to be accessed without scanning. I get warnings on some sites but do have the option to continue. Different browser, different security level.