"Do not share personal information online" is a warning that has been heeded since the internet was created. You don't need tech savvy to understand that message, just as you don't need to know anything about zoos to understand "Do not enter the lion cage".

With tech savvy it is possible to understand the dangers well enough to dismiss the common advice in certain cases, but if you don't have it — you had better listen to what others are telling you. If you wish to dismiss it, you are on your own.

[dead]