Given the growing acceptance of fascist / white-supremacist / Christian Nationalist views, I thought it worth mentioning that one of the dog-whistles you can watch for is the numbers 14 and 88. I realize I'm getting old, but the 14/88 dog-whistle used to be strictly among the sort of skin-heads that were prone to joining the American Nazi Party.... now, neo-nazis use it out in the open to let other neo-nazis know who they are.
See someone selling something Etsy for $14.88? Now you know who they are. See someone saying they just paid $1488 for a plane ticket to Charlottesville? Now you know who they are. See people with 1488 in their twitter handles and email addresses? It's a fair-bet that they have deep fascist/Christian Nationalist/white-supremacist sympathies.
(Those numbers can also be used completely innocently, so think and use context before jumping to conclusions)