Thanks, I thought that these are prioritized, so while the garbage links might fill up the queue, they'd do so only after all real links are visited, so the server load is the same. But of course, not all/most bots might be configured this way.
> If a link is posted somewhere, the bots will know it exists,
It's not clear that they are doing that. Web logs I've seen from other writing on this topic show them re-crawling the same pages at high rates, in addition to crawling new pages
Actually I've been informed otherwise, they crawl known links first according to this person:
> Unfortunately, based on what I'm seeing in my logs, I do need the bot detection. The crawlers that visit me, have a list of URLs to crawl, they do not immediately visit newly discovered URLs, so it would take a very, very long time to fill their queue. I don't want to give them that much time.
> If a link is posted somewhere, the bots will know it exists,