Let’s just say your past could come back and surprise you. He or she may want to introduce them selves and in some cases it might come with a bill for back child support, I’ve no doubt some lawyers are already working on this. Making claims for part of an estate could be another one they’re looking at. It also removes anonymity from sperm donors or those giving up a child for adoption which opens up another can of worms.
That there is some mighty creative speculation; particularly when such results would require attendant legal rubrics that do not currently exist.