No you don't and this is a problem. Anybody can say something abusive but that doesn't make it right.
>Just fail to identify a transgender person and use a wrong pronoun and you will find yourself in front of HR so fast that you won't have time to say sorry.
Out of all the transgender people I know, they will correct you if you fail to use the correct pronoun OR they will let you know first, that way you don't feel awkward. It is up to you then to follow through with it.
I think there are a vocal few who are super easily offended and too many people are focusing on them. They don't make up the general populace. Just like how not every guy is out to make crude jokes and be offensive. It always seems like the "not every guy" defensive always comes up but it is unfathomable that not everyone is as easily offended as this vocal minority.