I see no difference whatsoever between Pete Townshend looking a a child porn web site out of curiosity than me looking at footage of the jets being flown into the World Trade Centre. Both are electronic depictions of atrocities which were carried out in the full knowledge that people would want to look at them. Looking at them does not in any way increase the suffering of the victims. Yet that suffering was only perpetrated because those responsible knew people would want to look at it.
If it's there, people will look at it.