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.
Files can easily get lost if you don't have good protection on your site. A few of those files may be stored on your computer and easily replaceable, but what about the rest of them? Where will you get them out of again, if you lose them the first time? Especially for sites which have been in operation for a long time, fix malware problems free is very important. Many times, long-term sites have a good deal of data and have created a large number of files. Recreating all that would be a nightmare, and not something any business owner would like to do.
I protect an access to important files on the blog's server by placing an index.html file in the particular directory, which hides the files from public view.
Exclude pages - This plugin my blog provides a checkbox,"include this page in menus", which can be checked by default. If you uncheck it, the page won't appear in any listings of pages (which includes, and is ordinarily restricted to, your you could check here webpage navigation menus).
WordPress is one of the most popular platforms for blogs and websites. While WordPress is pretty secure out of the box, there are always going to be individuals who wish to create trouble by finding a way to split into sites or accounts to cause harm or inject hidden spammy links. That's why it's important to be certain that your WordPress installation is as secure as possible.
Don't use wp_ as a prefix for your databases. Web hosting providers are currently eliminating that default but if yours does not, adjust wp_ to anything but that.