We just put them IN our backpacks.
Again, it works some times, in some places, for some. But as far as I know, hiking poles, whether they are extendable, collapsible, taken apart, wrapped in cling film, with or without a rubber tip at the time of boarding, are prohibited as hand luggage on European airlines. I have asked at Manchester, Liverpool, Oslo and Porto and it's the same - you are not allowed to take them in. The hand luggage bag goes through the X-ray and in most cases will be taken to one side and you will be told to check the poles in or have them confiscated. As mentioned, it depends on the person on the day, but the rules are clear. If you want to take that risk, fine, but for people planning to do the same, please check the hand luggage requirements, what size bag you have paid for, what you can and can't take on board, and plan accordingly. I wouldn't want that stress and spend that extra time and money when I could be relaxing before my flight.
I use Pacerpoles which I can't just pick up anywhere, so I used to send mine in the post from the UK, but after brexit the time, hassle and cost has doubled so I now prefer to take them with me. In my pack, which I check in. Before I used to be able to take my little Osprey Tempest 30 (old version, the new ones have a stiffer back) and I could fit it under the seat in front of me, so it can be done if the pack has a soft back.