The whole thing got me a very angry mail from a Dutch search engine team (ilse.nl) whose bot had been stuck on it for an entire day. So, somehow their ill-code

The whole thing got me a very angry mail from a Dutch search engine team (ilse.nl) whose bot had been stuck on it for an entire day. So, somehow their ill-coded bot crashing was your fault? It's not like you forced them to crawl your site.