Board Thread:Naruto Discussions/@comment-1783334-20160228011652/@comment-18497248-20160228030712

No, unless they had prior experience with them, they have no idea what their enemies personalities are. Being extremely rude at all turns would also be suspicious. Especially considering not every villain is shown to be unnecessarily rude. In fact, some villains compliment the heroes on their strength, in spite of their loss. Kabuto, Nagato, Konan, Kakuzu, and Haku come to mind. I'm sure there are others that I can't think of at the moment.

To add on to that, Jirobo was a pushover in his team. He was only rude to enemies he thought beneath him. It wasn't Shikamaru's apology that outted him, it was him not correcting Tayuya's language. A very subtle trait they had no chance of knowing about.

In all, unless you've studied them closely beforehand, disguising yourself as the enemy in battle is very hit or miss.