Need answer regarding privacy respect please!

Hiya, okay so I know the band particularly noah has been clear about not making bad omens ur whole life and is quite private abt their lives and has spoken abt obviously toxic fans and social media ,which I respect their privacy so much! However, does this mean that if I see them out and about I shouldn't like come up to noah or the others to say hi or even ask for possibility of a photo/autograph? Like do they mind if fans come say hi or should we just pretend we don't know them and move on? I wouldn't wanna disrespect them or make them feel uncomfortable but it would be so nice to come say hi if I saw them again :) thanks xx