It depends on whether he would consider the filing's "invention" to be within a reasonable definition of what should be patentable.
If yes, then he's just playing his part in our society's overall machinations for technical progress, and there's nothing really blameworthy about the filing.
If no, then he's being deeply selfish: He's capitalizing on the government's unjustified encroachment on our individual liberties, via the patent system, for his own personal gain.
Where is the problem with such positions?
It's better, when you're arguing on the internet, to limit yourself to reasonable arguments that people are receptive to, and working to convince people.
I used to feel very strongly about patents (that they were "wrong") but, over time I've come to believe they are the least unreasonable protection for IP that also encourages long-term sharing. Trade secrets are worse because society as a whole doesn't get to benefit.