One of the many hobby horses that I've acquired in three decades of gassing on about communication is: Writers should never address an audience in the plural.
As in, "Dear Readers," "Dear Colleagues" or "Dear IT Goons."
It should always be Reader, Employee, or Goon—singular. Because though you're addressing an audience of multitudes, each audience member is reading your words alone.
I've said it before—and now I'm saying it again, because I found the perfect illustration.
You do the same thing to yourself when you address your audience from your perspective, rather than imagining them in theirs.
Got that, writer?