[hackerfantastic]

just to clarify, there are no warning messages doing this with signed WMV files. There is a single warning from Tor which you can selectively disable - and I am sure many users do. You open the file and the action is triggered, office documents now have protected mode which comes with alerting and I am sure that Adobe warns users in a similar fashion. Most users would not expect playing a movie file to perform this action hence why it has a use case here.