Very good point, I've added the following disclaimer:
While scraping can sometimes be used as a legitimate way to
access all kinds of data on the internet, it’s also important
to consider the legal implications. As was pointed out in the
comments on HN[1], there are many cases where scraping data
may be considered illegal, or open you to the possibility of
being sued. Similar to using a firearm, some uses of web
scraping techniques can be used for utility or sport, while
others can land you in jail. I am not a lawyer, but you
should be smart about how you use it.