Always check where a site is located, really. Many will try to get a US I.P. to mask where they really are. Do your checks.
It is important to know.
Try and find out where other users are. It is important so as not to insult anyone accidentally.
Many sites you think are American are not. This is important as American sites can be sued, many of these foreign sites can not.
Be conscious at all times that the people on the site could be anywhere in the world.
Be polite or don’t respond. Understand that what might be normal for you is not for them. A joke to you could be an insult to them.
Everywhere is Not here.