I'm annoyed by brute force attacks, not because they harm me, my server is pretty secure and no relevant data on it, but because they get away with it and might get someone else.
If I do whois idiot.hacker.ip.address
I usually get a field like
mail: provider@mail.cn
(They usually also have an info text that says Please report to 'email' for abuse/reports
.)
It wouldn't be hard to write a script that gets all of the blacklisted IPs from fail2ban and automatically group them by email and write emails to every provider giving the information (the IP addresses in a list that brute-forced from this provider) plus some standard text.
So my question is: If some tool like this exists and if doing something like this is even smart/useful at all, or if it just a waste of time and bandwidth that will just end up getting me banned or whatnot?