One should be vastly more worried about people who when they think of children think of porn, or vice-versa.

Normal people might think of children and think of playground safety or maybe how SUVs should be banned because they're so much more dangerous for children on streets than normal cars.

People whose top concern when it comes to "children" is "porn" are emotionally invested in a certain kind of association that normal people don't usually have in their minds in such strong terms.