Well, you are to some degree interested in mmorpgs and financial stuff, since this is a (economics) management game and a mmo..., just not an rpg. that´s not THAT far off, isn´t it? And if you don´t have any information about the guy you´re trying to hit him with SOMETHING, and if all you know is that he´s (a) playing online games and (b) playing a management game, I can tell you where they are coming from.
Wolph - why do you take everything so personal? Honestly, it´s quite common sense that public computers actually consume PLENTY porn, and if you´re one of many users, the theory that the history of your system leads to the advertisements you´re getting is by no means a personal attack against you. It´s just some kind of explanation, which may help you solve your problem: try to clean as much history (cache, cookies, maybe switch URL if you have the power to do so) as you can get your hands on, and with some (solid) possibility you might see less raunchy advertising.
Zwei Dinge sind unendlich, die Dummheit und das All...