Sarcasm taken a little too far ^^
Yes, those guys are on steroids. Yes, they've been busting their asses for most of their lives. Yes, they're huge. Yes, they're also genetically gifted.
However, the one thing you do not have to worry about, is getting to that size. Look at some of the NATURAL bodybuilders and see how much smaller they are. Those guys have still been busting ass for years.
The last thing you should do is drop squats and deads from your routine (or leave them out if you do not already have them). Yes, these exercises help you gain mass, but they will not make you freaky huge suddenly. You will have PLENTY of warning before you get there (at least a year). These should be kept, or added, to just about any routine. Not only do they pack on some mass, but provide great strength as well. Simple adjustments of reps when you reach your "ideal physique" can increase the strength with minimal mass gains.
Perfect diet, routine, dedication etc will get you some great size, and quickly at that, but one common misconception is that you will get to be 275lbs over night. Not going to happen my friend. You're overreacting, and I would highly suggest reading around (t-nation.com is a fave of mine) so you know what to expect.