Do Straight People Belong in Queer Fan Fiction Spaces?

As queer stories like #heartstopper and #heatedrivalry find wide appeal, tension arises as straight fans follow the fandom into queer spaces. One of these is spaces is the world of #fanfiction, long a queer refuge from heteronormative storylines. Are queer fans justified in being territorial, and what guidelines should straight fans follow in being respectful guests in spaces that are not their own?