I was always expecting something like this to be going on, so I'd never use any Web-based availability-checking tools but then I also tend to be a bit paranoid

I was always expecting something like this to be going on, so I'd never use any Web-based availability-checking tools but then I also tend to be a bit paranoid at times. Yet now it turns out not only is this established practice, there is even a Wikipedia entry on it. "It's only paranoia if they're not really after you!"