Addiction or a bad habit can be in any aspects of life. This is a hobby, and the things you mentioned about it consuming the time is a part of this hobby. If you were a car collector and restore cars, then you have to spend the appropriate time to research, make appointments, checking reviews, and so forth to make a good buy--then spend more time restoring the car. Every hobby requires time.
Lets move on to the addiction or consuming part. Everything you do, hobby or not requires management. If you decide to drink, you have to manage how many beers you take in--and if you do too much of this, then it can become an addiction and problematic. Even in life, you have to manage your sleep and everything in between. A deficient or excessive amount of anything can be good or bad for you.
Now, to answer your questions. "it sucks people in and progressive become a bigger part of their life"--its not a vacuum cleaner; sex releases endorphins (the habby signal in your brain). The hobby is a place to live your fantasies. Once your at home, living your old routine, its nothing fantasy about it. So, it can become problematic. You cannot suppress your real life, with temporary fixings. "Hobby breaks"-- of course, every1 does. This can be cause for many reasons: finance, family, commitment, SO's, the list continues. "Moderate your hobby cause your getting too far in"--the answer is self explanatory. If the person wants to hit rock bottom, then so be it, but the average Joe does moderate his hobbying habit if hes too far in.
Here's my advice: Its nothing new, everything has its pros and cons. You have to learn management techniques, take a step back from the current situation if need be, and evaluate your status (sometimes taking a break helps a person to realize this). Its like a burger, if you eat too much of it, you can development cardiovascular disease, develop multiple health problems including obesity, your behavior and mood changes b/c of your self-caused obesity, and so forth. Sure, it taste good, but you can't have it everyday. Thats why some people are morbidly obese while others are skinny beyond belief.
An insight and opinion: if a person cannot manage his behavior, then it speaks volumes of the persons character, his motivation, his commitment, his responsibilities, his knowledge, his self-esteem, and everything else in and between. Sorry about this lecture, but others may benefit from it.