I don't, because so many tools, so many choices. And imho DA is a hosting panel, not a firewall panel.
Like Peter Laws says, DA already has something like it, Cpanel doesn't as far as I know.
Anyway, it's even better to use tools which are specialized to do this, like CSF/LFD.
So if fail2ban would get their own stats, I would like CSF to have them too.