In this day and age why would you even call someone that on the pitch? Could he not think of somehting more imaginative like bawbag
I think winding someone up by calling them a poof is more a jibe at them being 'a bit soft' rather than anything about their sexuality.
But I suppose there could still be a homophobic element to it.
A bit like calling someone a fanny. Not to be taken literally. At least not always.