There is always this rule to have explained: Disallowed - Creation of walls of water/lava.
I have seen hundreds and hundreds of examples of houses, townships and landscape that make use of water/lava flowing from/through/on walls that could be considered "Creation of walls of water/lava." and none of them have ever been a problem, or handled in any negative way. So my current understand of this rule is to say huge constructs of walls, solely made from water/lava.
[USERGROUP=47][USERGROUP=47][USERGROUP=47]@Rules Council[/USERGROUP][/USERGROUP][/USERGROUP] would be good to clarify this, as it's now going to be a much more prominent happening. As I have said above, this has been happening for
years and has not been addressed negatively, but I am sure it will be brought up and should be better explained.