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.
The secure your wordpress site Codex has an outline of what permissions are acceptable. Directory and file permissions can be changed either via an FTP client or within the page from your web host.
Use strong passwords - Do your best to use a password, alpha-numeric, with upper and lower case and special characters. Easy to remember passwords are also easy to guess!
Is to delete the default administrator account. This is important because if you don't do it, a user name which they could attempt to crack is known by malicious user.
Security plug-ins that were all-Rounder can check my source be considered as a security checker that was complete. They scan and check the site and provide you with information about the possible weaknesses of the website.
There is. People know they could drop by your login form and where they can login and try a different combination of passwords and user accounts outside. So as to stop this from happening you want to pop over to this site set up Login Lockdown. It is a plugin that allows users to attempt and my review here login with a password three times. After that the IP address will be banned from the server for a specific timeframe.