That is exactly how I think Tom Hiddleson would react!
Loki: So, you think you can go around impersonating me, you mewling quim?
Loki: Hmph. I should have your heart for mockery such as this. *touches his heart with his scepter*
Tom: No wait! I'll do what you want!
Loki: Hm. Join my army and I'll spare your miserable life.
Tom: I accept.
Loki: Wise choice. *withdraws the scepter* Now, there's mischief to be had!