Investigate if the following scenario is feasible:
1. User search for a term
2. Search page returns no results for that term
3. The normal "0 results found" page is shown
4. the http status code for this is 404

This comes as a suggestion from Cloudflare, so we can rate limiting automated traffic to our search page with random/spam query strings. It's easier to rate limit the amount of 404 a single IP is generating.