I actually agree with wis75 that having a routine POA is not a good idea.
The OP asked for a general POA. I just think those are wrong (not talking about the Peace Corps situation where an adult is leaving the country and there may be a need for emergency arrangements). Having a POA might be more convenient if the parents have some legal documents that need to be signed, like bonds cashed in or a trust that the student is receiving, doing tax documents, or transfers, but is convenience a good reason for the parents to take over these responsibilities? If the student was living at home or close, would the parent still want to take these responsibilities from the adult students?
I used to approve POAs for one party to take sign loans for another. Usually it was a case of someone being in the military and his spouse taking out a loan in both their names or using a POA to give a mortgage. They had them, I approved the loans because the POA was good, but I never thought it was a good idea. The soldier could come back to a BIG debt and it was all legal because he had given the POA to his wife (or parents, or ‘really good friend’). Some parents are not trustworthy yet it is hard for an 18 year old to say “No, I don’t want to give you this control over my financial life.”
I have less trouble granting the medical POA because the law covers a lot of it. Parents decide for minors, next of kin for others. If the next of kin is still the parent, you haven’t done anything with the medical POA except established that the parent is next of kin. May save a few minutes, but most hospitals and ER’s are pretty familiar with who can give consent for medical treatment or no treatment. It is less clear who the next of kin is for an older person who might have survived all her own children but has some grandchildren and maybe a sibling. Who’s making decisions if she can’t? The POA clears that up. For 18 year olds who have never been married? Law is pretty clear it is a parent. If you give the medical POA to someone other than next in line, then yes, it has a little bit of power. Usually the patient retains the medical decision making power, and if it is a true emergency, the doctors and hospitals are going to go ahead with the best treatment anyway.
I don’t agree with wis75 that the documents should be with the signer and not the one being granted the power. If the student/son/patient has the documents (assume at the dorm/house/lockbox) how will that be helpful for anyone trying to transact business or in an emergency? If the parent doesn’t have the document, he can’t do anything so what was the point of signing the documents? If the child is only going to provide the POA when he needs something done, he should not use a general POA but a specific one to cash in the bond, sell the property, take a loan, file the taxes. It should be limited to that event and dated and would have to be given to the parent at the time needed. Probably saves no time and is more of a hassle than if the student just signs the papers, contacts the bank, does the taxes himself. With the marvels of telephones, express mail, notaries everywhere, it’s not that difficult to arrange documentation.
I can’t see what parents would be using these POAs to do while their children are available to sign for themselves.