Notice though, it is seemingly not possible to do so. You can't start a post with "@". You can however, start with a space, and then a "@".An example post wrote:@Xander, thanks for the tip.
If you try to post with just a "@" to begin with, it will not work. I just realized why I sometimes have issues when posting. I could never figure it out. When I would click on "Submit" it would just load a blank page, and it wouldn't post it. Now I know why (or at least one thing that causes this error).