If you try to bring ANY item on board that can conceivably be used as a striking / bludgeon weapon or a stabbing / poking weapon, it will likely be refused. Or, at least it ought to be, under international flight security rules.
Check ALL walking sticks- regardless of who they are for.
Yes, you will likely see many replies from others who will report anecdotally, how they got around the rules, or which person from what airline, on what route, on what day, chose to ignore the rules.
I always advise taking a conservative approach to airline security.
Hope this helps,
Tom