First of all, what exactly is Health.SE's stand on personal diagnosis? How is it defined? Example:
What can cause pimples?
The OP might have pimples and is trying to find the correlating cause (I.e. Acne). It might also just be a question to get a basic understanding how pimples work. Who and how to decide which is the case?
Secondly, how is one to respond to personal diagnosis? Lately, quite a few of it seems to happen and users (including me) answer the questions. Should we not answer them to stop the spread of this problem, and instead vote to close as off-topic (note that many might not have the necessary reputation and can only flag, which is a lengthy process)?
Lastly, I have also experienced down-voting happening to answers regarding what some consider personal diagnosis. Is it okay to down-vote answers to tell the user that this is an off-topic question and should not be answered, or should the "punishment" only appeal to OP's?
As for the first part of my question, I've found a possible solution: Every question where the answer includes "see the doctor of your choice" is personal. Is this standard practice here?
What do we do with personal questions though? Delete them? Close them? Currently, nothing happens at all.