The extent of MC's pyromania was to set fire to neighbor's shed when he was 12 or so. I think you're vastly overestimating his penchant and capability for actual violence.
Not to mention he doesn't strike me as someone who'd risk lives of other, innocent people. Or that the building is under full surveillance 24/7 and you can hardly play an amateur firestarter in such environment.
You're missing the point entirely.
The fact that he could blow that building in place because he has
1. The technical know how
2. Easy access to the necessary information and materials necessary
3. A history of harsh violence
4. An assumed (by Chuck and Kathleen at least) dark sadistic personality
5. Youthful lack of future forward thinking
All of that makes him someone you don't just fuck with for shits and giggles if you are as smart as Chuck and Kathleen are supposed to be. The fact that he has done zero zilch nada thus far means he isn't doing shit no matter what Victoria reveals or keeps to herself. That is the point I'm making. He's sold his soul for tuition. Victoria's situation is a nice cliffhanger and little more.