I have thought about it and would consider using them in the future. If used properly for bodybuilding, the negative effects are low, the danger is being addicted to using them and increasing your chances of getting the negative effects.
Almost all those bodies you see in health magizines have used steroids, it is very hard to get a low fat muscular body without strict training and diet for several years, or one year of proper steroid use and training.
It does take years to build a muscular physique and many people do not have the determination to do that, they want a shortcut, the easy option.