I don't understand those in this thread celebrating the "hacker spirit." The real "hacker spirit" would be something like, I don't know, building a better alternative to iMessage. This is just a game of whack-a-mole, destined to lose.
So, Beeper's approach here at least makes sense to me. They aren't representing the "hacker spirit" like Torvalds or Stallman, but they are highlighting how arbitrary some software limitations can be. Their efforts here, wasted or not, will be cited when iMessage finds itself in court next time. And to Beeper, a company founded on the idea of unifying all messaging clients, that may be a worthwhile business investment.