It is all part of the investigative process that I go through, especially when other people's work is involved.
I could have taken the easy way out and just deleted them from the files and concentrated on what I was doing but I am not built that way.
It is not a matter of over complicating things on my part but just a desire to seek the truth so others may benefit.
Whilst I agree with your assertion, somebody bothered to create them and then add them to the Library Files. Therefore there must have been a perceived need for them. It is not my place to wantonly destroy someone else's work. If nothing more comes from this thread I will simply place them into a "Miscellaneous" folder within the Library as 'Possible Signal Box Diagram Icons'.