Not a baker, but i use Baker tools cause it has neat stuff.
looked back thru some of the recent completely spammed out boards
The spam bot always links to posts that are (pb) without using "(pb)" to denote it
Every time, far as I see all the spam bot posts are this pattern
first pic in (me)
2nd pic is link to this board
3rd pic is spam
4th pic is NOT spam because poster correctly labelled the linked post as (PB)
it is easy to notice with baker tools bc it automatically adds (pb) and turns the text blue
so, when a post is missing the (pb) it is obvious.
all the spam bot posts are like this.
some of them link to posts from months ago
Maybe ANY (pb) link (with the exception of op/baker for notables purposes) requires captcha?
If the bot functions by scraping old boards to make sure post numbers are legit, this could slow it down some.