Unfortunately Ghostery and/or Adblock are not always an option.
My bank (ABN-AMRO) has recently updated their website and with that added Omniture tracking to all pages. If you use Ghostery (as I do) the site just stops functioning entirely and the entire Internet banking system doesn't work anymore.
So unless I permit Omniture to see everything what I am doing and effectively giving them access to my bank account including transferring money to other accounts... I cannot access my Internet banking system anymore.
BIG FAIL from the ABN-AMRO in my book. If you're going to use tracking/analytics software like this, make sure your website keeps working if it's not available...