The more you have to jump through hoops to get the data (or hide that you're getting it or that you're the one getting it), the more it sounds like doing this for the wrong reasons.
Also, since this is presumably something you're going to be doing as a hobby (money creates trails), the unfortunate reality is that "right" and "wrong" in copyright law matter much less than "Oh crap, I'm being sued for $500k in $further_away(New York|California), how do I defend this?" That's why you don't ignore the polite way of saying "go away" which is robots.txt or the rude way which is a C&D - if a lawsuit (the mean way) is the first communication you have from a company, odds are pretty good that an attorney can help because judges are busy and don't want lawsuits to be the first thing unhappy companies try.
Also, since this is presumably something you're going to be doing as a hobby (money creates trails), the unfortunate reality is that "right" and "wrong" in copyright law matter much less than "Oh crap, I'm being sued for $500k in $further_away(New York|California), how do I defend this?" That's why you don't ignore the polite way of saying "go away" which is robots.txt or the rude way which is a C&D - if a lawsuit (the mean way) is the first communication you have from a company, odds are pretty good that an attorney can help because judges are busy and don't want lawsuits to be the first thing unhappy companies try.