Just from experience; I had a friend now deceased on who out of habit always removed the drum on his cap gun every time he cleaned it, he was in a club/group that shot a lot. It was a Bogle rifle made by the current Joe Bogle, Joe told him removing the drum during cleaning was not a good thing to do but he continued this practice. Within a few years he complained to Joe that his drum had a little wiggle to it. Joe picked up the gun, tapped the hole to a larger thread size and installed a new drum. Ronnie, still stuck in his old ways, didn't learn and continued to remove the drum for cleaning. Again, within a few more years he gave Joe another call, the drum was loose again. I don't know if Joe fixed the gun again, Ronnie's cancer had just about gotten the best of him by this time.
This was a GM barrel, pretty tough stuff, I didn't know how hard Ronnie tightened the drum down but do know when Joe made a rifle, he timed the drum perfectly without using a lot of torque.
Joe made me a rifle that I pulled the breech plug on to remove a blockage one time. I checked the fit and found the best fitted breech plug I had ever seen; it went from finger tight to fully tight in one flat with a perfect breech face seal. I removed the drum from the gun Joe gave me because my Teslong showed it protruded just a touch too much into the breech and I needed to give it a trim, it tightened easily, no excess torque involved.
Not spreading false info as suggested above, I have seen the same wear with a TC breech plug and Ronnie's percussion drum from removal every time the gun was cleaned, removing a touch hole liner for cleaning would have the same end result over time. Of course, how much the gun was shot and cleaned would determine if removing the liner for cleaning would have a negative effect over time, this would not be a problem for a safe queen that is only shot occasionally.
I have an ironclad rule on the boards, if I don't have first-hand experience with a topic I don't say a word. If I offer a suggestion, I state that I don't have hands on knowledge of the topic in question and am only making a suggestion/guess that may or not be correct.