A while back, there was a thread about whether corrected typos after posting created duplicate notifications to those who had been '@ed' in the post. I don't know that I ever saw the final outcome.
Yesterday, there was conversation about customizing signature lines. It got me to playing around with mine. A lot. I changed it several times until I landed on something acceptable. Once I realized changes in signature lines take effect in every post you've made, I began wondering if all my changes were causing those whom I had previously '@ed' to receive multiple notices.
If that happened to you, I apologize.
Strive for respect instead of attention. It lasts longer.