What's up with that?
In order for any fish to be an IGFA record nowadays, it must be killed, gutted, and the stomach contents examined... to make sure it didn't die from lead poisoning.
I personally would only kill a fish I was going to eat or was required to kill by law. It would be far more fun to photo and measure it, then let the masses wonder if you let a record swim away alive.
I may even talk a little trash about it in certain circles!