TES wouldn't be TES without guards like that.
That is part of TES now; funny guards with their one liners. Guards are supposed to be annoying to a degree I think, and It's not that unrealistic. I could just imagine them being brainwashed and trained to say those things. It's not as bad as Daggerfall though. HALT! HALT! HALT!...HALT! They should make them a bit more complex, but they should still come off as mindless slaves for the Empire always on the watch for CRIMINAL SCUM!