Pay attention If I was someone that was completely convinced that the sp of any publicly traded company was overpriced and headed straight down, I'd short it . Plain and simple.
I wouldn't waste any time in a Mickey Mouse chat room while I have no position, unless I was that desperate for interaction.
Even if I had never shorted before, I'd call customer service and set up an account that allows it. It's not rocket science.
Like I said , if I was that convinced, I'd act upon it. Just posting in a chat room that the world overlooks would leave most feeling like a wimp.