Certainly it's an opinion ... which I believe is supported by the written regulations which appear on the form and by the text of the regulations describing the visa/permission categories.
If you have found an exception to the published regulations and texts appearing on the forms which provide an exemption for foreigners who have established residency in Mexico from the requirement to comply with the regulations, if they don't want to, or allowing them to lie about the purpose for their presence in Mexico ... please post a link to that. I think even a high school student understands the difference between who is as tourist and who is a resident.
It's one thing for someone to ask a question, and its another to provide information regarding how to break the law or violate the Mexican regulations ... advice which would, if offered, violate the terms of participation on this very forum from what I understand.
Instead of encouraging people to live in Mexico illegally, persons who claim to admire and respect Mexico and Mexicans might want to demonstrate those things by encouraging people who may in Mexico, or thinking of coming to Mexico, to honor and obey the law.