Originally Posted by Ken Chan /t/319852/i-told-you-to-remove-java-and-flash-from-your-macs#post_3915174
On Lion, Java does not silently auto-install, it will prompt you if you launch it from the shell. It does not auto-install at all from within Safari; you get "Missing Plug-In" as usual.
By some measure of "pretty" safe. The problem is that your known sites can get hacked and malware gets inserted. Of course, your known sites can also store your credentials in an insecure way. Plenty of ways to get burned. You can also reduce your chances of getting in an auto accident by never leaving your house....
Ken, I agree.. I think that's why I kept saying "on 10.6" (IE, NOT Lion). Prior to Lion, it did Auto install, and in fact, the installables were present on discs up until 2011. So, that's a big difference. But you can't assume all Mac users are on 10.7. Hell, you've still got a lot of people on Non-Intel Macs, believe it or not