As the PC repair guy said
"If I saw any child porn or terror material" - no mention of "extreme porn" or "within the terms of the act" or any other bollocks. Most men(not sure about women) would not recognise anything not "child pron or terrorist stuff" as wrong anyway(& unless the terst(as the septics say) stuff is Islamic,most wouldn't notice it ).
The bloke in the story being prosecuted must have either admitted guilt or been a complete idiot. Any decent brief should have shredded their case - what a lot of old cock (of whatever species)