It was a legitimate question. Unused RAM is wasted RAM. What good is it for unused RAM to be doing nothing? If it's free, Safari will use some of it and the more available, the more it will take.
Don't confuse what I'm saying about the freezing and RAM usage. These appear to be two separate issues. The freezing issue could be anything and it is doubtful that the RAM usage is the cause.
Flash is a common denominator in these freezing issues, but as you say Flash has become a scapegoat. While that is true, Flash also earned itself the reputation of causing many problems. It may not be the actual problem on your machine, but I recommended the first and most probable solution that usually works more often than not; uninstall Flash and then reinstall it.
The issue of Safari freezing all the time, could be anything. Have you emptied the cache and reset Safari from the file menu? Have you turned off any plugins and/or extensions to see if any of those are causing the problem? Are you experiencing any of the freezing on other applications?
As for the battery issue, you said earlier that the battery was getting drained quickly when using the laptop. The obvious answer and solution was to plug it in. I don't understand how that is undermining the user. How old is the battery and what are the load cycles on it? Check out this guide for more information:
Apple Notebook Battery FAQ
Yes that is correct. They say so right here:
Mac OS X 10.6 Help
However, that is likely just a legal thing for Apple in the event a real virus or malware ever comes to OS X. Then Apple can say we told you so and their butt is covered. In the mean time, read this and you will understand better the [non]issue of malware OS X.
Mac Virus/Malware Info