Building and flying copters and foamies is not universally accepted. It is legal (for now) in most parts of the world but there is a lot of government interest and that is scary for some people.
I am in Colorado Springs where throwing/flying anything at all in a local park is illegal. There is no place to fly here unless you own private property and even that is under attack by local, state and federal government.
It is legal for me to build and fly in my own backyard but I really don't want to draw attention to it in this political climate.
We have folks here from all over the world including places where the law is even less friendly to hobbyists.
Use your real name where and when it is safe to do so.
For all other places such as North Korea or on the internet, fly, be free; use an alias, don't show video or photos that can identify yourself, and use VPN to mask your IP.