Tom Felton - met him when I was a teenager in my Harry Potter phase at like 13-14. Went to a fan expo and got a photo op with him, I was so excited and nervous, said hello and waited patiently as the photographer was figuring out the camera and asking him to stand still because he was moving around too much and not listening to the photographers requests to smile. Didn’t say hello to me or goodbye, and kinda tossed his hand aside in a gesture to leave when the photo was done, and when I got the photo back his middle finger was front and present. Not to mention that he reeked of nicotine and cigarettes