I don t think it s necessary to change the word vandalism Wikipedia vandalism is named after real world vandalism not vice versa WP ASR doesn t specifically mention this sort of situation but I think that it covers it in spirit Same for WP NOT though to a lesser degree specifically the part about Wikipedia being an encyclopedia first and a community in service to that goal Pages about intra wikipedia matters like vandalism of articles are in a different namespace recognizable by the Wikipedia or WP before the page name so there s no need to change articles in the main namespace to prevent confusion