And I have looked at diffused reflections at far less than a meter without any damage to my eyes.
You're not getting it. LPF has to have a higher standard on laser safety otherwise you can get a lot of angry people itching for a lawsuit or worse someone losing their sight. People come here for guidance and information. If you're going to open your mouth make sure it doesn't subject LPF to a situation we don't want.One can easily see the burning of wood without safety goggles. I've done it many times and nothing is lost. On unpainted wood the diffused reflection is not that bright especially using blue lasers. However, you need to see the sensor surface when measuring the power. The diffused reflection, even with high power green lasers isn't that bright.