In a sense, you're right. But there's a big BUT
Apparently the poster wants to close his source to make money from it. That's his perfectly good right to do. The problem is that he's asking how to do that in a forum which thrives on openness. If you're stupid enough to do that, you deserve to get flamed. Especially if he doesn't even do some research on this site which would have learned him that asking questions about ways to close the source is a no-no.
So, if he wants to close the source to make money off of that particular piece of code, he wouldn't mind shelling out some money to achieve that goal, right? Well, whaddayknow!
Take a look at Stunnix Perl-obfus. Perfectly unreadable code for only $879! Seems like a bargain to me.