Detailed Instructions: Given a travel related situation, and given a specific question about the situation, summarize the question into a title
Q: I have never been to Istanbul but I am planning to go there with the kids. A friend of mine showed me yesterday a video of him buying ice cream from a traditional ice cream shop in Istanbul. He insists that it's a must for the man to do the usual tricks/troll with you before handing you your order.

I don't like that but I don't want to sound rude especially in front of my children. Is it a must from their culture point of view? can I avoid that?

The Wikipedia page for Dondurma doesn't mention anything about it.

The video is here

A:
Is it rude to tell the ice cream man in Istanbul not to mess with me?