I think I agree with most of the replies here saying that the way it was handled was rude. If the opening response to me talking to someone was like that, I would feel like, okay, who pissed in your cheerios and I would have walked off.

Like others have said, there’s more to the solution than a yes or no. I personally think “depends on the favor” , is a very appropriate response, or a “maybe what do you want” Or if you’re planning on saying no regardless, do it how you did, without calling the other person creepy, its just extremly rude to assume someone is a creep while also shutting them down before they can actually talk.