User blog comment:Zippertrain85/Top 10: Least favorite NPCs./@comment-6336669-20130819074943/@comment-9062114-20130821195126

The fact that it's never mentioned by any Imperial (besides Hadvar) that the Stormcloaks we're a secret service for him. It's also out of character for Ulfric and his soldiers since they talk about how they're fighting for freedom a lot.