My wife researches genetic disorders, and would be greatly interested in putting together a way to do this, but it would need to have absolute security. Not only is the information legally sensitive, it can also be used to deny or raise the price of healthcare insurance or, in an extreme, to weed out possible mates.
With that said, it can also be highly important in an informed world to know what we are preinclined to have issues with so that we can take early steps to mitigate them. If nothing else, being aware can help younger generations to prepare for the onset of conditions in whatever manner they deem fit.
There are accepted ways for esearch labs helping out families with a genetic diagnosis without inadvertently sharing that information, but they are under doctor/patient privilege. Here on WikiTree, there is just no level of trust with which you could accurately set a piece of information with that level of security.