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?
firmly agree. It’s all about the presentation. For example, using what was provided above the act of just saying no was a neutral sentence. Adding afterward that that’s just sus changed it from being a neutral to a negative because now you’re accusing the other person of being sketchy/sus,without providing the ability to prove otherwise. That I find rude.