Yes, I kill ActiveX and Java scripts and Java as well and make use of the "Trusted Sites" zone for those I that absolutely require java/javascript to run. Damn banks.
However, MS has its own Java and does not use the Sun crap, or they munge it up so it is not intrusive. It may be slow and ugly, but at least it stays out of the way of everything else in the computer.
When Firefox can do away with the Sun crap, I'll give it a look now that I know tabs can be disabled.