@fredsbend There are no auto suspestions, but there are some auto-restrictions. Too much low quality content will trigger a rate limit system, and it's possible to get automatically blocked from posting either questions or anaswers if you post too many poorly recieved ones withouot fixing any of them.
That doesn't show up as a suspension however. The blocked user will just see a message about it in place of the form for posting. They also get warned several times before they actually get blocked.