And I thought I had a migraine before I started reading this.
To start: The way this was presented was all wrong. "I'm fed up with this and am doing something about it even if people hate me for it" should instead have been a new thread saying "Hey Danbooru community, I have an idea for addressing what I feel is an issue. Here is exactly what the bot will do, and how it will do it. Please discuss whether this is appropriate, and if it is, how it can be made better."
After reading this - admittedly I've probably already forgotten half of what I read - I still do not understand very basic questions about this bot:
1. What quality control is in effect to address Pixiv's notoriously incomplete and non-standard tagging. I only occasionally see a Pixiv image I'd consider tagged to danbooru standards.
2. How the content rating problem will be addressed, considering most non-explicit images are actually safe, not questionable, thus defaulting to questionable will be wrong more often than not.
3. What safeguards are in place regarding "high priority" tags, by which I mean tags critical to blacklisting: loli, shota, sex tags, violence tags.
If the answer is that "it might be able to do a somewhat better job than the more irresponsible "first!"-obsessed uploaders (and almost by definition a worse job than responsible uploaders), and good tag gardeners will just fill in behind it", then I cannot conclude that the benefits outweigh the costs.
It seems like a lot of support you got earlier in the thread turned out to be based on good tagging and good uploads you'd done in the past few months without the bot, thus they don't inform us as to how the bot will perform.
My other issue with this is that your fervor, while based on good intentions, is disproportionate to the actual problem, which was hardly as catastrophic as claimed. If you held off on talking about this because you thought others wouldn't share your belief that it's a gigantic problem, that in itself should tell you something.
There have been a few suggestions in the thread about finding ways to quantitatively identify sub-par taggers and surface their names (whether just to mods or more publicly) and punish (or educate! not everyone who tags poorly is being a dick) as appropriate. These strike me as far more effective solutions than simply making it impossible to upload popular artists.
(Let's face it, there's probably not enough reasonably accessible non-Pixiv material to go around. I partly stopped uploading because I did believe strongly in following individual blogs, just as you do, but all those artists moved to Pixiv and it was pointless to try to manually monitor 200 individual websites when everything was on pixiv - often faster, in better resolution, and with more amendments.)
After all, the problem isn't uploading quickly. It's tagging badly. If someone camps Pixiv but exhibits good tagging, there's no problem.
To be clear, I don't really care about uploaders' feelings. However, Danbooru is still a community. Automation can help in some ways, but if you get hit by a truck or your script breaks beyond repair, human beings still need to be around to pick up the slack. The role of "incentive", which has been debated, is not zero. I believe the incentive should be primarily driven by the individual's desire to contribute usefully (not by concrete rewards parceled out by the site); uploading a good image and tagging it well needs to be its own reward. Users who sacrifice quality for speed would need to be scrutinized - though it won't necessarily be as harshly as you or others might want.
The last thing I'd say is that I would prefer never to see an image on this site that didn't pass through a human filter at some point (obvious exceptions like correcting for Pixiv thumbnails aside).
I could go on but this is enough for now. Other mods, please leave the thread open, since this is obviously not resolved.