All chemicals are dangerous, including water, if they are not respected and used appropriately. Some on this forum are known to enjoy ethanol/water mixtures...…., even then, there are choice to be made with its use that are guided by the potential hazards that can ensue. Most solvents, but not all, because they are relatively volatile, are usually more hazardous through inhalation resulting in light headedness or because they are flammable. If you want to know the potential hazards of any chemicals (solvents) that are routinely used in modelling, along with guidance on their safe use then check out their material data safety sheet (MSDS). These MSDS files can be found simply by googling the solvent.
To the best of my knowledge, acetone is not a carcinogen but should be used in a well ventilated area to avoid vapor build ups which can be problematic.
TexCHEM