AT&T in TN is an epic example of all 3 and then some. The most recent unbelievably stupid thing I've personally observed was the construction of 15 miles of new fiber on county power poles; right beside a Verizon fiber line that had been there for a decade. They put no slack loops in theirs, VZW's run has many.
that line went up this year, and has been torn down and out of service 3 times, so far, that I know of. Oddly I hear the VZW line keeps failing shortly after the ATT trucks are seen, where I dont recall hearing much about failures on the VZW before this year. So perhaps there was a design consideration that suggested the construction method.