No I don't think they are real, because if they were then they'd be as interested in contacting us (for either good reasons i.e friendship or bad reasons i.e colonization)  as we are interested in contacting them. They would have made their presence on our planet officially known to all long ago. But what we are seeing is purported sighting of UFO by ordinary folks without any concrete evidence to back it up. If there is such a civilization outside our planet or galaxy with technology so advanced that they can so easily visit our planet at any time, I believe they would have made their presence known to us over the years.