Signposts sometimes get in the way. It’s fine to go through the View menu to hide them but it would be faster to select the signpost and hide it (by that I mean hiding all of its kind). Either a key command or via context-sensitive mouse menu.
Yes, having them behind other objects would be very useful. I like having them visible but it can be annoying that they cover up things, especially since they are pretty wide (compared to the symbols that some other programs use in their place).
You have a few options - try looking in Preferences > Key Commands for the menu option to hide/show all signposts. There’s also a key command “Hide Invisibles” that temporarily hides all things that don’t print (including signposts and frame edges etc).