I'm wondering why you think that the fiber over the ceiling tile is somehow less tracked, maintained, monitored, documented, etc., than any other fiber in the network?
If someone was really concerned about trackability, etc., then I suspect they would invent a number for that cable, put a record in their circuit database, and use their nifty label maker machine to put labels every meter along the cable's length stating the circuit number, and NOC contact info. All of that work is still not much more than the effort of stringing the cable but it makes the whole architecture a lot more scalable. So there is a middle ground between flinging cables around and paying $1000 per month for a cross-connect... Middle grounds are nice places to play in. Lot's of variety, lot's of possibilities. --Michael Dillon