Disabling a scheduled task is easy, but unfortunately vendors are piling on additional less obvious hooks. Eg. Dropbox recreates its scheduled task every time you (run? update?) it, and I've seen others that utilize the various autostart registry locations (there are lots of them) and non-obvious executables to perform similar "repair" operations. You wind up in "Deny Access" whackamole and even that isn't always effective. Uninstalling isn't an option if there's a business need for the software.

The fundamental issue is their developers / product managers have decided they know better than you. For the many users out there who are clueless to IT this may be accurate, but it's frustrating to me and probably others who upvoted the original comment.