For every relevant action users perform on a site (posting comments, voting, reporting/flagging, etc.) I store his IP and host name (retrieved from PHP function
gethostname() - doc). I have copied this idea of storing the host name from a WordPress rating plugin.
I thought that if a well known plugin is doing this, it is because that info is somehow useful when moderating comments or avoiding poll manipulations. But now that I'm redesigning the site and the database structure, I start to question if this info is really useful.
Is it normal to keep this info? Should I keep it or just drop the column?