I don't really understand why three separate people have decided to attack the exact same strawman of my argument. Read my response to the other person's?
In guessing this is sarcasm given these tools predate modern social networks and serve such a fundamental feature as "Save Page" within browsers already.
cron doesn't do that. As for curl/wget, both can be used to do all kinds of things other than just "Save Page". Consider combining cron and curl to upload a file to a server every hour, or to download and execute some sort of backdoor script. Whether they predate modern social networks or not is irrelevant.