As an Ex staff member who actively tried to enforce these rules i know just the answer.
Issue being that rules such as naming cons, mixing (mostly mixing) will go unpunished because staff are not enforcing it because its not 'too severe' by the admission of US staff team about 3 months ago. If you do try to enforce these rules you will be bullied and your day will be made 100 times worse by people who just hold grudges because you told them that mixing is against rules.
From experience i can tell you that my mental health extremely tanked as soon as a bunch of idiots started harrasing me all over the internet from CN (I couldn't prove it was them since alts but it was kinda obvious). If you ask, yes you can mute them, ban them and whatever but if they follow you afterwards, it doesen't really matter, which then inturn leads you to not enforce certain rules even subcontiously. Also that there are biases involved, majority of US players know one another and will try to cover for them (in the rarer cases, but can still happen).
To summarize this. US is much more combat oriented, you will find mixing and generally its unfriendly towards roleplay unlike UK.
Another example of this would be someone telling a person who is A-1 to change their name (from just codename) because they are not on A-1 job. On UK this is absolutely normal, but on US.. good luck not getting burned at the gates by the community.
