That sounds boring but manageable. 'Thinking about nothing' seems impossible and stupid at the same time; people who do the disservice of saying that should be slapped.
The point of meditation is to learn how to control your thoughts, specifically in being able to realize that your are choosing your current train of thought, and that you can switch it at any time. If you are stuck worrying, or being sad, or unable to see the richness in something, it's most likely because you can't properly focus on the only thing you'll ever have in life: this moment.
While you & the author are technically right, batgaijin is saying that it's bad advice for beginners to be told "think of nothing".
Sounds like you could use some time meditating about your hostile attitude :) Seriously though, so much of eastern thought related to mediation involves paradoxes that a practitioner reflects on in order to grow.
Think about nothing
Observe your thoughts in a detached state
Do no work but get everything done
I started learning about meditation from the standpoint of trying to detach myself from the constant buzz of thoughts (i.e. 'thinking about nothing'). I seriously doubt that there is a entirely right or wrong way to teach meditation since it ultimately involves a process of self discovery and coming up with whatever metaphor works best for oneself is an important part of the process.
That's because it is impossible.