Safari hijacked by mackeeper.zeobit - really, this is TOO MUCH

Question

I clicked on a news article about a pastor who died recently in Sacramento, and a malware popup for mackeeper.zeobit.com urged me to clean my computer. The malware shut all the other Safari windows. The pop-up had an OK button, but NO OTHER WAY to remove the pop-up or close Safari. The normal window controls were missing.  All Safari Menu options were greyed out.  I tried using the Apple Menu to Shut Down, but that failed as Safari refused to Quit.
As Safari would not Force Quit (greyed out) and would not Quit when I used the Apple menu to Shut Down, I powered off using the Power Button ...several times. No good - still had the non-closeable window and Menu options to Force Quit Safari or Reset Safari were greyed out.
I spent a long time using Chrome to read a lengthly Apple discussion, which ended May 28th. Not really up-to-date and no practical help.  Finally, for no particular reason except for the passage of much time (30+ minutes?); when I next checked the Safari menu, the Reset Safari and Force Quit Safari options were no longer greyed out. 
So I Reset Safari and Force Quit Safari for good measure.  Now I'm afraid to reopen Safari.  For now, I'm stuck using Chrome; and I don't care to use the Google product as it is basically spyware, IMO.
So, two questions:
1. Is there something I can do at the basic user level to prevent such interference that doesn't also cripple browser performance?
2. Is Apple going to do anything about getting these Mackeeper and MacDefender creeps from invading their browser?  (Oh, I know you don't know... just venting... sigh... I mean, this stuff's been happening to people for many months, my software's up to date, i guess Apple isn't too worried about us little users getting freaked.)
~~~Teelbee

Answer 1

Many users will see references to an application called MacKeeper on various web sites and via pop-ups on their browser. Not only is it expensive for what it purports to do (freeware applications that do the same or more are readily available), it can sometimes install itself without the user realising it, and it can be very tricky to get rid of.
MacKeeper can be regarded as highly invasive malware* that can de-stablize your operating system. It is unethically marketed by a company called Zeobit and a rip-off.
Further opinion on it and how to uninstall MacKeeper malware can be read here:
http://applehelpwriter.com/2011/09/21/how-to-uninstall-mackeeper-malware/
Do NOT download or use the ‘MacKeeper uninstaller’ from the Zeobit site, as this will cause even more damage to your operating system.
This is also worth reading:
http://www.reedcorner.net/news.php/?p=245
Equally phoney was iAntivirus:
http://www.reedcorner.net/news.php/?p=341
until it was purchased recently (May 2012) by Symantic (makers of Norton anti-virus which does not work well with Apple OS X). Even after having tinkered with it, iAntivirus still fails to do the job properly and cannot be recommended.
There are no viruses that can affect Apple OS X and there is therefore no reason to run anti-virus software on a Mac, but a Mac, like all computers, can transmit viruses and malware to other users particularly those running Windows. Note, however, that Trojans are another matter and can represent a genuine threat, an example of which was the recent 'Flashback Trojan' which you can read more about here:
https://discussions.apple.com/docs/DOC-3261
For further information you may find this User Tip on Viruses, Trojan Detection and Removal, as well as general Internet Security and Privacy, useful:
https://discussions.apple.com/docs/DOC-2435
The User Tip (which you are welcome to print out and retain for future reference) seeks to offer some guidance on the main security threats and how to avoid them.
* The expression ‘malware’ is a general term used by computer professionals to mean a variety of forms of hostile, intrusive, or annoying software.