Gaming is about all I do. Cant get any zombie prep in cause my parents wont believe me...
You could also use the oldest trick in the book and tell your parents it's for a reason other than anti-zed.
Dude I live in PA. No disaster will ever happen here. You never know what could happen. I just got to thinking about how this winter has been bad for a lot of people in lots of places, you never knw when your electricity could be off for a week or two, or the roads too frozen for travel. Maybe with an argument like that you could convince your parents to store a little extra food, a couple extra blankets, maybe kerosene heaters and a propane stove, the essentials you will need to survive. In the meantime eyeball the house for shelves that could be taken apart in an emergency to fortify windows and doors, make sure you have a decent tool kit. If you don't have one maybe take a shop class and convince your parents to buy you a set of simple hand tools, hammer, drill, screwdrivers and at least a hand saw. As far as srvival tools go if you can't convince your parents to buy the whole family matching AK-47's, you may have to get creative, maybe a boys&girls club(Boy Scouts or 4-H, along those lines) that has archery or convince them to get you a pellet rifle. The pellet rifle could be used t harvest game such as small birds, and you could use makeshift AZW's for undead defense. If none of this still doesn't work, you may have to get CrimsonKing to send your parents a brochure about the dangers of deadly Ghost Gators (which I hear are moving north even as we speak).