Actually, to answer your first question, yes, it's bad.
The American Academy of Pediatricians recommend that infants stay in the same bedroom with their parents until at least six months of age and it is recommended until they hit a full year old unless you have a good-quality baby monitor.
It is recommended that infants sleep in the parents’ room, close to the parents’ bed, but on a separate surface designed for infants, ideally for the first year of life, but at least for the first 6 months.
The infant’s crib, portable crib, play yard, or bassinet should be placed in the parents’ bedroom until the child’s first birthday. Although there is no specific evidence for moving an infant to his or her own room before 1 year of age, the first 6 months are particularly critical, because the rates of SIDS and other sleep-related deaths, particularly those occurring in bed-sharing situations, are highest in the first 6 months. Placing the crib close to the parents’ bed so that the infant is within view and reach can facilitate feeding, comforting, and monitoring of the infant. Room-sharing reduces SIDS risk and removes the possibility of suffocation, strangulation, and entrapment that may occur when the infant is sleeping in the adult bed.
My baby just turned six months old and we plan to keep him in our room for at least a year based on this recommendation, which our personal pediatrician also echoes. Moving him to his own room after that will depend on him to a degree. We want him to be independent but we like having him close by.
It's also becoming increasingly popular for parents to co-sleep (in the same bed) with their infants, though the AAP recommends against this, but the evidence against it is questionable depending on which study you look at.