Originally Posted by AEO
I find that some people do not wear their helmets correctly, or they are using what looks like a really old helmet, beat up helmet (The kind you can get in CT). They either don't read the warning label and instructions, or leave it attached to the handlebars.
Most cyclists don't know that helmets have expiry dates...the UV rays break down the plastic/fibreglass and they become very brittle with age
Same with construction hard hats and fireman/miner's helmets