You shouldn't disallow everything in your state... The parents should be educated about it and say stop to their kids, these days parents are submerged by all the techs stuff and they don't understand anything. Sadly. The problem is more global, even 20-25 years old adults do nothing about their days because they doom-scroll... This shouldn't be banned (but yeah the companies behind it are evil to do some evil stuffs), after they will banned everything.
If I want to host my services to the internet, I need to open a port in my firewall nah? is that not a bit risky than only allow access from the address of the data center to use this open port?
I would like to access to my server only trough the proxy, like if I put my real IP I end up with nothing, but if I put the proxy IP it show me my server
I don't know if it's a good thing... To use RCS you have to use a compatible OS + device and use the google messages app (maybe also the Samsung one now) and why does the brand implemented this is because google "offered" the servers to run this protocol. I think even today the best way is to get onto secure messaging apps (like Signal, Session, SimpleX...)
My opinion is that if you don't have not much money to spend into video games that's okay to pirate it, but try to encourage the creators by donating or just say thanks!