People who break the rules of the New York City Transit Authority for their own benefit. This is usually illegal, as it involves stealing MTA property, and/or trespassing. This includes breaking into the cabs of subway trains, peeling stickers off of buses, or changing the route signage on trains without permission. It also often causes confusion in the system.
Conquesters don't usually admit their wrongdoings, and usually claim to be "civilized transit enthusiasts."
Foamer: *removes poster from subway station for an active service change*
Railfan: OMFG YOU CONQUESTER! WHY WOULD YOU STEAL THE POSTER!?!
Foamer: It's for the collection. Now leave me alone, since I'm just trying to enjoy the trains and I don't need your ass annoying me.
n. software that is no longer sold or supported by the original publisher / developer, often found as free downloads on the internet because it cannot be obtained elsewhere. Not legal, but often seen as morally acceptable because the company that made it is no longer selling the title, nor releasing it as freeware, therefore abandonware is "keeping the gamealive", so to speak.
Doom II is not abandonware because idstill sells it, while The Incredible Machine is not sold, therefore is abandonware.