[ConcernedCitizen]

The biggest pitfall of pornography being free online is that anybody can host anything and you've probably seen some underage women, especially if you've searched for '18 year old', even on sites requiring age verification. It's not impossible or even that uncommon to host underage content on legal sites like Pornhub, Redtube, Bangbros etc. It's best to avoid pornography, anyways. It sets unrealistic standards and expectations, sometimes dangerous ones.