I finally updated my forum to 7.5.8, partly to take advantage of the "stop forum spam" features. But I am not sure how SFS works. I hope someone can help explain...

Example:
Today I have an obvious robo-spammer signup. They are really easy to spot with the nonsense entries. If left alone, in a few days, they will post spam to the forum.

IP Address: 221.150.243.183
Email Address: ooodhhu@outlook.com
Username: sbqotxls
Display Name: abcdef568906

I check on the SFS site and see the IP has been entered:
Email Address: ooobnjg@outlook.com
Username: wgcxslld
Date is about 7 days prior to now.

If that IP is logged on SFS, shouldn't they be blocked from registering on my site?

Thanks in advance!