Porcelain Ceramic

I have all the tiles ceramic porcelain home. Can you scratch with furniture?
I have all China ceramic tile in the house. They scratched with chairs / beds and other furniture porcealin be directly over ceramic tile? If we move / slide chairs harm the tile? I think these pictures are rated 4 or 5 on the hardness scale. Why not walk on it with shoes?
Do not scratch the porcelain. I do not know that everything he says prevent lasting Karlsson. There are things you can buy in order to establish their furniture, dressers, tables, etc., which is like a soft carpet on the bottom, slides easily, and not zero when things happen. I suspect that you and your visitors will be socks to walk on this floor to maintain a carpet to wear shoes ..