Public interview bad?

Heii.
I was just sitting in the McDonalds when such a guy came to me and asked me if he could interview me about media usage and soo. I agreed and then he gave me his laptop and I had to complete a digital questionnaire…
Should I be worried?
He showed me his interview ID and also that it's all anonymous and so on. Nevertheless, I'm unsure…

Why are you doing something like that? Lol 😂

Well, as long as you have not entered any photos or your addressee, nothing bad will happen in the worst case

Personally, I'm generally very careful with interviews. Did he show you a passport? Hope very much that you did not sign anything or reveal personal data! Please be careful who you answer which questions!

Yes, he showed me a pass