So, I'm on a bender again and have become filled with autistic curiosity about those stairs. They have the potential to be a hazard if my research is correct. The two closest stairs I could find for the trooncase are
this and
this, which are weight-rated for either 300 or 450 pounds. That means if three Tranchlings go up in file, they'll go over the weight limit, potentially by a lot. The stairs could suffer damage and eventually catastrophically collapse if used regularly with multiple Tranchlings. Also, and I'm less certain of this, but those stairs are usually pretty narrow; less than two and a half feet usually and by my guestimate would take a left-right tilt of 18 degrees unloaded to tip, corresponding to one side sinking slightly less than nine inches into the mud. Put Kevin on there, it might take considerably less, potentially sub 10 degrees, or one leg sinking roughly four inches into the mud. The actual answer is somewhere inbetween more likely than not, but it does seem possible to me at the moment that Earl could go stair-tipping or sabotage the stairs at some point in the not-so-far-off future.