Yes, brief or casual inhalation of methanol vapors can be harmful, causing irritation to the mucous membranes of the eyes, nose, and throat, alongside headaches, dizziness, and central nervous system depression. Prolonged exposure or intentional deep inhalation of concentrated methanol vapors in poorly ventilated spaces allows the chemical to enter the bloodstream through the lungs, posing significant systemic health risks similar to dermal absorption or ingestion.