The problem of illegal edits and redistributes will always be there. People will edit and redistribute models they shouldn't, we can't change that. But there are always people who want to inform others not to do that. Sometimes it helps, but sometimes both sides start to argue.. So..
Easy steps how to react to illegal actions in MMD Community:

If you won't be able to handle negative and completely troll-ish replies from the person who is doing something illegal- do not comment. It will lead to something we do not want- drama.

If you are not sure if the person edited something he shouldn't:

Do not comment with hate. Ask nicely at first, e.g: The face of your model, looks like Kio's Lily, did you use her or i am mistaken it? The answer might not always be true, but if the person reacts very harshly you can either suspect something and continue being calm with the questions or leave him alone to avoid drama

Do not show the person to public. This is a stupid thing to do. If you really are not sure about that, do not post a journal or picture about it, contact a person who knows the rules and could help with the problem. Because no-one likes to be trolled, and people will do that after you will show the person to public.

Do not comment with hate at any circumstances. Maybe the person is new to MMD and PMD and doesn't know all the rules? Inform him nicely, e.g: You used Nanami's Teto to create your model, you do know she can't be edited?. Sometimes this helps, but if the person is troll-ish and know the rules and says they are stupid (Look to the first step)
These are the most common and basic problems. There are a lot of them in our MMD Community, but you should know that if you will do something with hate, your reply won't be nice. So please, stay calm or do not comment at all
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