I've done it twice. Once in 2001 season I had just left my job and went to a day game at Qualcomm Stadium. I had just about the entire right field bleacher section to myself. Just Gwynn and I out there. I took a pair of headphones, listened to Jerry and Ted and stretched out over about 3 seats. Beautiful sunny day, it was great.
The second time was this past year. I missed opening day since I was in Florida. I left the airport and went straight to the second game of the season. I couldn't wait any longer for baseball to start. I went alone but ended up running into some friends, so it almost doesn't count.
Jonny Dub is going to Opening Day this year by himself. He's a little nervous. He was only able to buy one Park Pass this year. Who wants to be his friend? You have to buy him a hot dog, a beer and then make sure he doesn't do anything crazy.