I'm always open to the idea that I could be wrong, but nothing about this screams exploit. Does it scream cheap and ridiculously easy? Yes and maybe that's truly the issue that those against it take with it. However, assuming that the designer/s of Dark Designs are reasonable adults, it isn't easy for me to accept that this and so many other Fates were DESIGNED, these fates didn't create themselves, this way accidentally.
Assuming it isn't an exploit, I have to say that though I'm normally on the side of the minority on these sorts of issues, the players that intentionally complete this fate just to annoy players that aren't playing the way they like come off as pretty low individuals. Say what you like about why you're doing it (seals, whatever) but the truth is that you're doing what you want to do without regard for a large group of people that will be setback as a consequence.