I take it off but I keep it inside the bag. I am glad my vintage Casino came with the hangtag, but I have never been a fan of charms or things dangling off my bag. I also remove key bells/clochettes from my bags. Nice to have as part of the complete package, but not necessary for me to use.
Edit: someone also mentioned this, but I too used the hangtag as a tester for a leather cleaner and conditioner before trying them on my bag, and it was so helpful!
Edit: someone also mentioned this, but I too used the hangtag as a tester for a leather cleaner and conditioner before trying them on my bag, and it was so helpful!