Some random dude walked up to me while I was waiting outside a food place for my food and asked me this question.
I said “no, I dont give out random favors” and something along the lines of that’s sus.
Is it rude to say no to random dude that asks for a favor?
You weren’t there.
He walked up and said hi and wanted to shake my hand (red flags germaphobe)
Hey, can I ask you a favor? (As he tries to set stuff down next to me on the table, red flags what do you want from me, money, theft, drugs)
I stood up and was like like “no, you can’t ask me a favor.”
Like, seriously I guess I am rude for wanting to sit in peace and waiting for food from place.
You’re mixing up two very different things. In your post you asked how you should respond in the general situation of someone asking if you could do them a favor, and so that’s the question that people answered on this page. But then in your replies you try to apply those answers to a totally different situation.
Here’s the answer to the question you asked, and then the answer to the question you were trying to ask:
BUT