The OL Junkmail filter obviously does a simple substring matching, not a word-matching (as the rule condition's description "... matching words or phrases..." would imply). Thus also emails containing harmless combinations of e.g. the word "s e x" like in "Sus s e x" or "People s E x press" or similar get filtered. Can't one teach this stupid filter to actually match entire words only? Or even better: can one specify real "regular expressions"?
Edited later: Oh my goodness! This stupid forum software even censors appends for "offensive" words and removes them from the text. This is so sick and braindamaged!