Alessandro, as far as I can see, vaillant has only asked a question. It's a little off-topic, but I don't read any ill-will there. On the other hand, we will not have any of the users bullying any of the others. Please understand that, by opening discussion about your business, you've made it a topic for discussion.
If you don't want to answer the question, don't. If you feel a statement is factually incorrect, feel free to correct it. If someone has revealed your trade secrets, contact us and we'll investigate. But please do not tell people what they are and are not allowed to discuss here, something which is a violation of the registration terms.