Deleting cache files

I was reading a thread earlier that referenced another acrihived discussion http://discussions.apple.com/thread.jspa?messageID=6416285&#6416285 where troubleshooting is accomplished by deleting the cache files in ~/library/caches
and /library. However there is another cache folder in system/library. If i moved this folder into the trash while logged into my account in the gui I have a nasty feeling i would crash the mac- is this right or is it okay to delete this one as per the others?

OSX gets cranky if you delete things while it's using them. If you don't know what the cache is, you can't be sure it isn't in use.
There are utilities (I use OnyX) that will do various maintenance and cleaning for you. OnyX will close all applications while performing certain tasks, which will help protect you.
But that's no guarantee. I've never had a problem, but there are others here who say they have.
Ordinarily, your best bet is to leave them alone unless you know what they are (like a browser cache) or are having trouble with them.
To paraphrase a bad, old commercial, "It's not NICE to fool mother Mac!"

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