The next step in your progression here might be:
If / when people have personal research bots that go and look for answers across a number of sites, requesting many pages much faster than humans do - what's the tipping point? Is personal web crawling ok? What if it gets a bit smarter and tried to anticipate what you'll ask and does a bunch of crawling to gather information regularly to try to stay up to date on things (from your machine)? Or is it when you tip the scale further and do general / mass crawling for many users to consume that it becomes a problem?