Well, this is a serious disappointment. I think bundled installers are bad things. I don't like it when the Java updater keeps urging me to install this or that on Windows, and I don't like it anywhere else. I'm a reasonably alert user, but I support many users who aren't and am constantly clearing up things that they never intended to install.
I've relied on Macupdate.com for years and years, and wasn't aware (though I should have been) that I was uploading items to a site that distributes bundled installers. I very much hope you're reconsider the policy of using such things, and instead, only use the installers or downloads provided by the original authors.