The Selected Red Flags
Red Flags In Fandom has been condensed to eight sections seen in the author's 30+ years in the unreal world of conventions.
Interesting note, the simplified graphic below was a result of a low-tech need to create a reference tool to display at a panel and took on a form similar to WHMIS warning label (both advise of toxicity in the environment).
Please feel free to save a copy of the graphic.