I finally had to block GoogleBot. Despite setting the crawl rate in both my robots.txt file and my account with them (one should not have to create an account to set a bot crawl rate, IMHO), it has continued to be very aggressive, to the point my daily logs were showing anywhere between 10%-25% of my traffic was GoogleBot (The other one on my site that shows more is TwitterBot, which has been blocked for years, and will not give up, despite been given a 403). I know folks are going to say you'll lose your SEO. I am not worried about my SEO. When I implemented my site back in 2009, it was and still is for my enjoyment. If other folks, like a number of users here, find it useful, that's great and I thank you for looking.
John