This is one reason I do not install or use toolbars that aren't built with the application. Not ask, not google, not yahoo, not almost any of them. I don't let Firefox install the Yahoo toolbar. The only one I would consider using might be Mailfoundry's ham/spam reporter in Outlook, a tool that performs a very simple and very valuable service if you use Mailfoundry's anti-spam systems or services.

I neither want nor need any of those things wiping my nose and butt every time I turn around, with or without the same tissue.

The thing to remember is that those toolbars are for their convenience, not yours.