good question, this forum first started as a Japanese car club only, but with some time other brand owners registered or even some founder members bought other brand cars, like our president, that have owned other brand cars, he even drive a Jetta GLI right now, (he recently acquired a honda too)
whatever the kind or rand of car members drive, they are welcome, we are a warm forum, and accept almost all kind of people, but they have to understand they are in Jap territory (or at least I hope that)
And as Type R said, making jokes of other kinds of cars, specially VAGS and even more of VW, is common over here