I have had two WordPress blogs hacked into in the past. That was at a time when I was doing very little internet marketing, and until I found time to address the situation (months later), these sites were penalised in the search engines. They were not removed, but the rankings were reduced.
Install the fix wordpress malware plugin Firewall Plugin. This plugin investigates requests that are net with simple WordPress-particular heuristics to recognize and stop attacks that are most obvious.
Use strong passwords - Do what you can to use a password, alpha-numeric. Easy to remember passwords are easy to guess!
I don't think there is a person out there that after learning how much of a problem WordPress hacking is that it is a fantastic idea. However is that when it comes to securing their sites, bloggers seem to be stuck in this reactive state.
BACK UP your website frequently and keep a copy on your own computer and off-site storage. If you have a site, back up every day. You spend a lot of money and time on your site, don't skip this! Is BackupBuddy, no back up plugins, widgets, your files and database. Need to move your website this will do it in less than a few minutes!
The plugin should be updated to stay current with the latest WordPress release, play nice and have WordPress cloning and restore capabilities. The ability to clone your site (in addition to regular backups) can be useful if you ever want click to read more to do an offline website redesign, among other things.