Quoted from hAbO:A friend of mine and wife went to see Area 51 on vacation to Vegas. He got too close near the outer perimeter and a car showed up with 2 armed guards. The must have already looked him up as they knew his name, address, where he worked and that they were on vacation. They said something like he'd better go back to Vegas and enjoy his vacation. The car followed them all the way back to Vegas to make sure they were leaving.
Sounds like an urban legend to me. Always starts with "A friend of mine..........." It's about 150 miles from Vegas to Area 51.