I wouldn't worry about it too much. If you're on a decent hoster it's *virtually* impossible to hack a site, providing you don't have any winky extensions that open up the gates. ddos/brute force is another story that can really bring down a site without much you can do about it unless you have access to tons of hardware.
But the main thing to do is first find out where any issue is coming from before blaming OC as it's pretty solid

@straighlight
Thanks for confirming this
