Can I be the only one on here for whom it is obvious that the software to do what you suggest is way beyond what you will see on WikiTree for a very long time? Beyond being WAY too complex to handle, it deals with a problem that is a fairly insignificant, and is best dealt with in other ways.
The One World Tree is built by and for volunteers, none of whom are paid, and none of whom are perfect, and none of whom are expected to be perfect.
The WikiTree way to handle this sort of thing, when you run across it, it if bothers you that much, is to try to establish who authored it, and to politely ask them to explain what they really mean, and what your concern is. Better yet, you can try to find, and then add, better sources, making that problematic source irrelevant. At least that's the way I think it's supposed to be on here. Getting up on a soap box about it doesn't really solve anything, and is really just a counterproductive waste of time.
Just within the last few days I ran across a profile for somebody that said they had died circa 2000. I pointed out to them that the person was listed among the survivors in her brother-in-law's obituary, which was less than 10 years ago, and that I doubted that she was even deceased. I didn't give some stern lecture, or call for magical software to inhibit this horrible infraction. Within 24 hours, the profile was private. Problem solved; no feathers ruffled.