I have answered this on your another thread. Check it out.
First of just because you see someone's status on the forum as "VIP," "Hero." etc. has no relevance. This is purely based on number of comments you have posted.
As regards your questions, as a minor, you cannot sign or file any documents and therefore legally, you do not act on your own behalf. Further, an immigration application is for the primary applicant and not the dependents. Your parents immigration application, which was refused will have no bearing on your application and you did the right thing by answering no.
However, if you have doubts you can send a CSE and clarify that you were a part of an immigration application filed by your parents in [YEAR] which was refused.
Irrespective of whether you inform IRCC or not, it doesn't matter.
The statutory questions are asked to do a BGC and are also used for misrepresentation. Section 40 of the IRPA defines "misrepresentation" as:
Further s. 127 states:
Now the question revolves around,
Materiality & Relevancy
Just because if a question is answered incorrectly, of falsely or with incomplete information, it doesn’t mean that misrepresentation will or can result in a problem. That depends on whether the information was “material” and “relating to a relevant matter that induces or could induce an error in the administration of this Act.” To be material, a misrepresentation need not be decisive or determinative but it will be material if it is important enough to affect the process.
Failure to Disclose
Innocent misrepresentations include statements that are not accurate. More problematic are those cases where, although not asked, one fails to disclose information that which is relevant and material.
The leading case on this area is
Brooks [1974] S.C.R. 850
In your case, failure to disclose is immaterial, but since you are aware of it, you should inform IRCC even though it will not matter in making a decision on your application.