[diggan]

> Honest question, is blog spam still a huge problem today if you’re not running a buggy old Wordpress stack, or better yet, not using Wordpress at all?

Yes, the most basic ones just go by form fields, easy to see if you expose some sort of comment form and add a hidden "first_name" field users don't see, but the bots are stupid enough to fill out all fields no matter their visibility.

The more advanced ones won't get caught in that, but there are tons of general tools for automatically spamming even hand made forms/fields on the fly.