Where someone sniffs can be a danger too. Busy roads, railways, building sites, canals and rivers become extremely dangerous if you've been sniffing solvents. You could fall in a river and not remember how to swim. You might think there's plenty of time to cross the road, but there's not. If you're going to use these substances then make sure that somebody else is with you.
Most people start sniffing solvents or aerosols 'just to see what it's like'.
Nobody ever expects to come to harm, or to have a problem. Some people get into sniffing regularly because they like the buzz better than being straight. They don't think of it as 'a problem', it's just something they do. Solvents and aerosols are just like other drugs. They change how you feel, but they don't take problems away.