It's not just about finding an answer. It's also about participating.... especially for newer members. In the time you took to respond, you could have given a short opinion on joint protectors. If we didnt discuss things already talked about, we wouldn't have a forum. It would just be a FAQ page.
I use joint protectors. As cheap as they are, I demand they be included with any cue I purchase as part of the deal. I'm suprised most cue manufacturers (or retailers) do not include them as advertising. If a set costs $5 retail, they have less then $2 a set invested. Cheap advertising if your logo is printed on the end (think Seyberts for example)
Yes... I keep my cues in a hard case. But they will still move if you drop the case on the pin end. And, think about baggage handlers if you travel with your cues. Think about TSA opening your case. I've heard in one case where TSA took the cue from the case and pulled the butt plug looking for whatever. It wasnt reinstalled flush is how he knew.
But the joint protectors become very important when you use a soft case. No pin protection whatsoever. And they protect the case too!