I have a co-worker who highlights EVERYTHING.
You give her a list, she reads it and then goes back to highlight the important parts. Give her a calendar, she reads it, then goes back to highlight the important parts.
All that's good, except that she winds up highlighting EVERYTHING.
I've thought about asking her about it. I've thought I should probably point out that highlighting everything is really just the same as highlighting nothing at all. I mean, if you've just turned every word on the page yellow, nothing really stands out, which kind of defeats the whole purpose of that magical highlighter technology.
This particular coworker is getting a bit advanced in years, so I thought that she was perhaps highlighting everything in order to see it better, but I the other day I found a document in a file from like 1980 that she'd highlighted the crap out of, so that ain't it.
Thus far I've been able to restrain myself and, miraculously, haven't teased her about her colorful hobby. I'm also fighting the temptation to see what would happen if I hid the highlighters for a day or two. (Mostly that out of fear, not kindness, because I witnessed first hand the madness that ensued last year when a tape dispenser went missing. We literally had to lock down the building until it turned up unharmed).