Quote Originally Posted by ICountFrom0 View Post
"You have to <action> or we can't win" is one of the bannable things.

This includes, "use tank stance"
"drag the flare away from the group"
and
"stack for the stack marker"
or even "heal the tank".

All things that are perfectly reasonable requirements that a dungeon or a trial might have, but we're not allowed to say anymore.
I think the important part of the clause you elected to pick as an example is "You can't do it any other way, so STOP it" - Which is pretty much the clause that makes it a compel.

Conversely,

Example of a violation:
"We can only beat [Lakshmi] by using [Vril]. You can't do it any other way, so stop doing that!" - by unilaterally excluding their opinions without respecting theirs, which is considered a violation.
Example of a non-violation:
"I think [Lakshmi] will go more smoothly if we do [Vril], so I want to try doing it this way, is that okay with everyone?" - it is not a violation to suggest one's own opinion/policy or to present a counterproposal to an opinion,

Expressing your wishes in the form of a request, as in the following example, does not constitute a violation.

"I'm getting attacked by the enemies, can you put on your stance?"
"It would be great if you could focus on healing because I'm in trouble!"
This pretty much negates anything above.
"We're about to be hit with a split damage AoE, can we all stack up?"
"The Tank is low on HP, are you able to focus on healing them?"
"I think we're handling this pull perfectly well, it would be great if you could try pulling more"

TL;DR: Just word it in the right way and you still get your point across.. You don't need to get your point across by being condescending, or by subsequently negating their style of play by trying to impose your own onto them.