If I understand the research correctly, stretching before activity decreases joint stability, which is bad for the average person, and worse if your joints are hypermobile. I do stretching at other times, so that I don't risk that! The other one is 'no held stretches' for hypermobile joints, because ... umm, something about stretching the wrong thing. If I can find the reference and remember why I was looking for it, I'll come back here.