In a previous thread on cairns
http://bushwalk.com/forum/search.php?keywords=marker+tape+removal, I asked about one possible cause for their existence:
"A Parks Vic employee [Coopracambra NP] told me that plastic tape was used to mark locations where bait (foxes, dogs) had been laid. In some situations, it needed to be visible on the side of a track by other staff when driving. Perhaps someone can confirm or deny whether this is routine. All I will say is that if such baiting gets results, I'm happy to put up with seeing the tape."
No confirmations or denials were posted. So I am asking again. Two further points. That exchange with Parks Vic staff occurred at least a decade ago. Maybe it's a discontinued practise. However, I saw two dangly bits (of pink tape, that is) in Cobboboonee NP (GSWW) last week, spaced less than fifty metres apart on the side of a vehicular track that had tyre marks. I very much doubt that this tape had a navigational, decorational or cosmological purpose.