You guys are so brave to write at work! I wouldn't ever... not even on my lunch break lol I'd be terrified of the guys at my work catching me and I'd never, ever live it down!
I still have a binder full of my high school fanfics. It was very much the same as yours, Lore where my friend and I would trade back and forth and write. I don't think I'd ever have the heart to throw them out though. I'll just keep it in my BSB bin haha.
It helps that behind me is a window and the person sitting next to me hasn't been here for 2 months and before that my boss sat next to me and didn't care as long as I got my work done. LOL. I certainly don't ignore work for writing but my work has slow times so I write to keep busy. I've been writing fanfics at work for ever.. lol. I worked at a credit union and wrote them between members at my window, I worked at a mortgage company and wrote them during slow points (though there weren't many there) and at my current job, Widow's Walk was written completely at work and many of my newer stories are written here with some written at home heh.
Asfar as my fanfics from high school. I tried not to throw them out but 14 years is a long time to hold on to something for memories sake. With cleaning the house with the intent of selling and moving I decided it was time to say goodbye.