Disallow join for line-based families

[LoganCarrozza]

This is a revival of an archived idea.

https://forums.autodesk.com/t5/revit-ideas/disallow-join-for-line-based-families/idi-p/6715433

We need a way to disallow automatic join of line-based families. Its ridiculous this isn't already an option, and instead people have to come up with work arounds to get what they want. 

A few examples:

https://forums.autodesk.com/t5/revit-architecture-forum/line-based-families-moving-together/m-p/9430...

https://forums.autodesk.com/t5/revit-architecture-forum/unjoin-line-based-family/m-p/5864452#M100962

[Fabian.OswaldS52TK]

Would be very helpful.