Okay, DWWA, etc. Or to put it another way, why bother. Next time I probably won't.
But PPP has recently been beefed up precisely because of this exact problem of immigrants whose fictitious parents are "sourced" all over the internet.
Opinions differ on whether the cure is worse than the disease. But it certainly is if it isn't even fixing the problem.
A PPP on an Unknown parentless early immigrant is a huge LEAVE ME ALONE flag. The chances of the true parents turning up are negligible.
There needs to be a clear policy on what it takes to remove these things.