I do use mine.

I have the Silver one on the roll aboard to help identify it from all the other Case Logic suitcases in the area.

I have my Bronze one on my checked baggage, in case it does get ripped off or lost. I at least then have a couple of spares. Also, I am with BotB in that I secretly hope to wind up any dykwia stuck behind me at baggage drop.

I also have a bright yellow FT tag on both.