People need to understand famous people are normal every day people and give them space. I actually know a couple people who've encountered Roy Keane in different ways.
My brother a rag was about 15 or 16, he saw Roy Keane in a McDonald's with his missus and kids and stupidly went over shouting "Keano Keano". He probably invaded his personal space ignoring social norms admitted it was stupidity in youth really.
He said Roy Keane gave him the death stare before his missus piped up, "he's just a stupid kid happy to see you leave him."
My bro said his look didn't change when he stared across at him a few mins later, my brother loves him so loves to tell the story a lot but he also always looked quite young for his age too, in one way I can defo see how Keane was rightly pissed off with him but in another it's a bit sad him staring down a kid who looked like he was 13 or 14 at the time.
He's also met my mum's husbands sister, a cleaner and paid dog walker who had no idea who he was, she still works for a neighbour of his has done for years he had a spat with her an exchange of words about the bigger dogs she was walking, he was worried about his own smaller dog as the dogs she walked wasn't muzzled but on a lead, he told her not to let it happen again and she sternly replied hers are on a lead that they'd do nowt but listen to all her commands, and told him to get his own idiot dog on a lead instead of letting his run amok at the German Shepherds she walked, he seemed perplexed by the fact she didn't know who he was (after giving the Ronnie "do you know who I am" Pickering big man routine) but he listened, he put the lead on his dog after initial worries but afterwards she maintained he had an unpleasant angin rude demeanor about him, she's common as muck too so wasn't shocked by a poor attitude's but in his defence, he might've genuinely got caught off guard in a state of really worrying for his little mutt... He loves his dogs Roy I hear.