You make several very important points here, and I appreciate that you are differentiating between bidbot use to promote good posts and bidbot use to promote lazy posts. If people are increasing their SP in this way, they will be empowered to hit back at the flaggers, so that's another reason to try and stop them in their tracks early on.
Coincidentally I just discovered SteemLookup, which is a great resource, and this is a great way to use it.