Actually, you don't even need the msi, unless that is the only mode you have for installation. Can use the java package with a /s switch and then use the deployment.properties file with custom configs in the link below to disable many features for java.
Visit /r/sysadmin and ask how well that works. Oracle makes undocumented changes and breaks things all the time. So you can have the proper settings to ignore toolbars, but randomly they'll install. Whoops. Who at Oracle do you complain to?
MSI's are just safer/simpler/easier to test/easier to deploy. The fact that they hide it is pretty unforgivable.
If they are installing, you are using the wrong installer. The one from the developers section on oracle's website does not include these toolbar's. Yes, msi's are easier to work with and many companies do not provide them, not just Oracle, but when you are given lemon's you make lemonade. Especially since complaining to oracle will get you no where.
http://docs.oracle.com/javase/7/docs/technotes/guides/jweb/j...