It's not rudeness really, just irritating and only some people do it, I'd say most people will say something to get my attention. Do you do this too? If I'm cle

It's not rudeness really, just irritating and only some people do it, I'd say most people will say something to get my attention. Do you do this too? If I'm clearly not talking to someone else why stand there silently if I haven't noticed you? Seems the same as calling someone on the phone but not saying anything.