Sniffing glue or any other inhalants for the purpose to get high is very dangerous specially for growing teen years.
According to the most recent study by the National Household Survey on Drug Abuse, nearly seventeen million Americans have tried huffing or inhaling the intoxicating fumes from common household products. More adolescents are using inhalants than those who use illicit drugs. Teenagers who might never try illegal drugs may try inhalants because they are legal, and easy to access. Inhalants are inexpensive and relatively easy to steal.
Parents who find outs that their teen is huffing or abusing any inhalant substance, should act and step forward on this problem. As Denial is a subtle foe and with it comes unresolved issues regarding the danger and abuse of inhalants.
Relevant source: http://www.teendrugabuse.us/inhalants.html