Of course, there will be people looking for those keywords for another context (e.g. writing a novel) but Google has been studying not only what we search but the intent in that search.
A simple example is when you look for a specific dish, your first results show you recipes, but if you add a name of a city, you get restaurants instead of recipes. So Google already knows the difference in intent just by adding one more keyword.
Google could also apply intent into the searches in this domain and be able to recognize the difference from all the data they gather daily from us.
Now, I'm not saying you should lock up people just because of what they search, but it could raise a flag of suspicious activity, like the example I've put in the article...that murder could've been prevented!
Regarding the last part, the migration to another search engine will be effective if users realized that Google is not doing their job well, dispatching red flags when there's no real threat. People use it because it's an excellent search engine, and they'll continue to use it if they know it's effective and gets them the answers they're looking for.
Thanks for the feedback, Teresa!