I was originally going to ask if there could be an indicator that you had posted to a thread even if several pages before or earlier in it's life span. I still think that would be a good feature to have BUT I did notice every thread I had posted to the "Bell" is RED vs. BLUE. So maybe that's good enough but if I click the bell for it's intended purpose, to be notified about new replies to the topic, it goes BLUE again so maybe that's not the solution.
It would be IMO a nice feature to either have a symbol or text to allow the user to know that they have posted in a thread so they don't repeat a posting. While not an issue with recent posts, sometimes when one is resurrected I find myself sometimes wanting to respond to one I already made the same point.
If there is a way to tell I am all ears to find it!