Who Is Queer?

First of all, the question I’m about to ask isn’t about setting up boundaries, gatekeepers or telling someone what they can/can’t identify as. I’m simply curious about how the queer community views what it means to be queer. So, with that in mind, here’s the question:

Q: Can a 100% heterosexual person also be queer?

In the discussions I’ve had online, some say yes, yes with qualifiers and some say no. What about a heterosexual, heteronormative, cisgender, vanilla person? Would you consider that person to be queer in the same way a bi, gender queer, trans person who’s part of the the Scene could be queer? Are they both “queer”?  What are your thoughts?

Some claim that they are unable to form an opinion without me first defining exactly what queer is. The entire point of this question is to merely elicit your feedback, not create a definition. Some claim exacerbation with “identity politics” and metaphorically wring their hands asserting that anyone can call themselves whatever they want and nobody has a right to say anything about it. This is a strawman. I’m not trying to nail down a definition nor am I asking this question so that someone can tell others people how they can or identify.

As I said, I’m simply curious to know what YOU think. What contours do YOU think this term has in its cultural topography?