Is there a list of placeable items that enemies don't attack?

I get lost really easily in games that don't have a gps-like map.

Please note that I am not complaining that this game doesn't have such a map. I've been gaming since the 80's, an era where almost no games had maps or minimaps, so I always find a way to do breadcrumbs for myself.

In Abiotic Factor, the main thing I do is in areas where I am sure I'll have trouble finding my way back, I hang signs.

So far, I haven't had any signs get destroyed by enemies, but I was hoping to get confirmation on that. I'm also interested in knowing what other things they don't bother going aggro on. Like levers...do they attack those?

Wondering if there is a list like that anywhere on the internet? Google came up empty but it could have been what I typed in my search not being worded quite right.

I learned that alt-codes (the arrow) work on Sign text.