The part to feel guilty about is that I chose not to explain that the salesman is probably either lying, or insane, or both, and therefore probably shouldn’t be considered “a trusted friend”. And also that I chose to just try to avoid both of these people, rather than… thinking of a less blatantly unfriendly solution.
I don’t understand what you mean by a better solution; I wouldn’t feel guilty about doing what you did.
The part to feel guilty about is that I chose not to explain that the salesman is probably either lying, or insane, or both, and therefore probably shouldn’t be considered “a trusted friend”. And also that I chose to just try to avoid both of these people, rather than… thinking of a less blatantly unfriendly solution.