Not including a useful feature simply because someone might misuse it to his detriment sounds somewhat like the government trying to protect us from ourselves.
Do we need more of that in pursuit of our passion to fly?
Frank’s suggestion of a set (default?) 3.5 degree glide slope sounds like a reasonable approach (no pun). No one here is talking about shooting an ILS approach in actual IMC using this feature. For that matter, what is to prevent someone from shooting a localizer approach with the existing iFly, or a VOR approach? That capability is in the iFly right now.
I am very much in favor of implementing this feature.
BTW, I too am an OLD pilot but not an ancient one.