Me? No, I do not. If an extraterrestrial civilization had the capabilities to send scouting parties and research teams between our two solar systems, then they would be so incredibly advanced they wouldn't need to skulk around at night abducting hillbillies and making crop circles. We would be like ants compared to them; they could come and go as they please in broad daylight doing whatever they wished to us and we would be powerless against their technology. Who knows, maybe they have their own Prime Directive or something, lol.
But do I believe there is sentient life somewhere out in the cosmos? I'd like to think so.