You sign the patent application under oath with possible consequences of perjury. Therefore you should not sign an application that you believe is wrong, including if you think its claims of being innovative are not justified.
But if you refusing to sign because you do not think it should be patentable, then your refusal is inappropriate. Your opinions on what should be patentable is something you should discuss as a citizen with your various congressional representatives.
If the application is truthful, the company is entitled to file -- whether you think filing the patent is good for society as a whole or not.
Two can Live as Cheaply as One for Half as Long. -- Howard Kandel