Thanks for the clarification on Ganmi, it was a confusing case.
As for intent sensing. This is an interesting case, i just read it up so my knowledge may be incomplete. But are a few things that caught my attention. Let me break down the ability:
Noldor Intent sensing, is said to work without sensing chakra.
This on the other hand is the ability to sense killing intent even without the use of unique chakra sensing.
On the other hand, the rationale presented was the dark and light allignment of someone's chakra
This was proven possible by the likes of Karin who could sense the darkness is Sasuke chakra and the lightness in Narutos
A better comparison would have been Kurama's ability which is likely what Noldor sensing is based on. There is a contradiction between intention and rationale provided. And it needs clarification because, if understanding a Hayabusa's intent has anything to do with understanding a Hayabusa's chakra. It renders ability unusable against us.
Secondly, intent is defined as good and bad, with bad detectable and good undetectable. This is a tricky ability, because good and bad are relative. What's considered bad would entirely depend on psychology of the user and opponent.
An interesting case would be to see a psychotic noldor. They are said to be perfect, but even perfect is a relative term. Then if a psychotic Noldor consider's killing people as good,
because for example it might reduce world population and prevent exploitation of the planets resources. Then his negative emotion sensing would respond to someone who's trying to save another life. This makes their kekkei genkai convenient since it can be used to burn whatever they deem impure because an absolute doesn't exist even though it supposedly works around a concept of good and bad.
To put a constraint on it, parameters of the sensing should be defined. For instance, define negative and whatever misses the definition is inapplicable. That would leave negative emotions sensing truly around killing intent, anger or intending some harm on someone.
I've gone off topic however, to answer your question.
1) Action is not intent. We can act aggressively, as long as there is a persistent idea that our actions wont ultimately cause harm to the Nolder (as well as an idea that there arent many possibilities they could be harmed). Otherwise it would be detectable.
2) They are able to detect negative intent, but are they able to detect what exactly the intent is? Or how we intend to fulfill what we intended (csdzbusiuisd tongue twisters...). From my understanding yeah they are able to perceive that the nature of our intention is negative or harmful, but their description or their abilities don't imply that they can tell what the intention is? how we will do it? or from where we will do it? Unless the physical vibrations of the ground gives it away, they cant tell spikes will rise from a blind spot. They can only tell we're being naughty.
Now my third answer really depends on whether or not the second one is right but my gut tells me it isn't. Third scenario wouldn't have existed if my answer to the second was true in its entirety.
Also, due to the fact that a Hayabusa is essentially out of the plain of existence in this form, they cannot attack an opponent or mold their chakra to use techniques until they release the wujin and once again appear in the enemies senses.
this is worded precariously by Scorps but there is a way to work around it. "cannot attack" and "mold their chakra to use techniques" are key phrases. Defensive, non-chakra enabled taijutsu is acceptable by my interpretation of this. Any who would disagree may take it to any of the other mods but this prevents exploitation of enemies while we use the full eraser of our existence.
I hope this refers to the active Wujin ability and not the passive.
Does the full activation of Wujin constitute our physical eraser of our existence thereby meaning any interaction with us by another is just as impossible as us with them? OR is it simply our perceived existence. If in the case of the former than my previous statement of defensive/evasive taijutsu would be null as we would not even exist to need to use it. If the situation is the latter than defensive/evasive non-chakra taijutsu should be acceptable correct?
Agreed.