That's a funny standard, and not that I disagree--quite the contrary--but once you get an undergrad in engineering you're an engineer right? Sure, there is an expectation to pass the FE exam but is being employed as an engineer a requirement to "be an engineer"?
I hear a lot of people with a BS in Comp Science that call themselves computer scientists which seems mostly inaccurate too.
It's just odd, these titles and what qualifies you to call yourself a thing.