All these posts about "being walked out" are interesting, and remind me of when I left my last company (the one before where I am now).
Although my boss and I got along fine, I knew that MegaCorp's HR was walking people out the door if they knew you were going to a competitor. They would still honor the two week notice, and in California, they also have to pay out unused vacation time.
I gave two weeks notice, fully expecting to be walked out and have a "free" two weeks vacation. However, my boss asked me to finish up a few last details, and he held off telling HR. A few days go by, and I'm getting antsy, as I really want to go. So I tell him it's time to tell HR, they need to know, so he walks down to tell them.
When he comes back, he tells me to head down there, they want to talk to me.
HR asked me a series of questions, one of which was where I was going. I have never told an employer where I'm going, and never will. It's none of their business. I just told them it was a similar company in the same area, and could be considered a competitor. That was all they needed to hear. Took my badge, signed some paperwork, and out the door I went.
I didn't even have to pack up personal belongings, as I never keep personal stuff in my cube. Never. No pictures, knick knacks, nothing. I got in that habit after seeing way too many people let go at a place I used to work at in the mid 90's, who would be tapped on the shoulder and then when they got back to their desk, watcher over by a security guard as they packed up their stuff in a little box and escorted out the door. Not me - nothing to pack up. Sign papers, hand in my badge, and I'm out the door.
Never could understand people who filled their cube with "stuff". Pictures, plants, knick knacks, kids' drawings, posters, toys (yes, toys), stuffed animals, etc. Different strokes I guess...