Ohio is just plain weird sometimes. It's legal to sell fireworks in Ohio but not for use in Ohio ('cept by fire officials or pros). There's a waiver that must be signed stating that they are for use outside of Ohio. Most folks just sign the lie and buy what they want.

Regarding knives, I've been a cop in Ohio for almost 20 years and I've never even checked a knife to see if it was auto-open, let alone bust someone for possessing one. Of course there will always be cops that'll bust their granny for jaywalkin' but I'm not one of them. smile