I only found out when he made a comment in one of his earlier videos, that led me to dig a bit. He hosts a FB group called The Scale Modelers Critique Group, which in turn has generated a counter group of disaffected former members called The Scale Modelers Asylum Group or some such. His group has an introductory video explaining the purpose and operating rules of his group, which is basically a warning that if you are thin skinned it is probably not a group for you. It actually is a good group and dispenses some good advice but by participating you are explicitly asking for constructive and detailed advice and critique of your work. Not for everyone. He takes his own medicine as they say and I have not encountered anything mean spirited anywhere in his stuff but as we Americans say he calls a spade a spade.