no..shot guns do NOT have rifled barrels.
it's no use for shot.
what you might be thinking of is rifled SLUGS. The rifleing is on the projectile...not the gun

the point is that guncontrol not only doesn't work it makes the problem worse.

When guns are outlawed only outlaws will have guns.

update.
you're right. Some shotguns do have rifled barrels. The reason is to comply with the law
Shotguns are often used with rifled barrels in locations where it is not lawful to hunt with a rifle. Typically, a sabot slug is used in these barrels for maximum accuracy and performance.

stupid law.