Yeah if I saw someone wandering around in a suit at Apple I'd assume it was a hardware vendor who somehow broke free from his handlers and was snooping for secrets.
Those were pretty much the only people you'd see hanging around in suits.
Even at Apple, there are a few people who observe Formal Fridays, and some of them quite extravagantly so.
Yeah... I'm not going to confuse a guy wearing an formal ascot for a visiting engineer.
Are you being sarcastic? I didn’t claim they’d call security - just that you’d be judged for not knowing the (unwritten, which is the problem) norms.