Quote Originally Posted by Abdula
No I don't think its as simple as there not being a flaw in the transformation. To pull it off properly you have to be able to hide your chakra and completely remove your presence, which most people aren't able to do. So higher level ninjas would be able to sense them even if they don't know exactly where they are.
That was an exceptionally dumb thing to say especially for a manga reader.

Not all ninja's are able to sense chakra, this isn't dragon ball Abdula.