Question/scenario: Say you bought a gun from your LGS. You're the original owner of it. You post photos of it online, showcasing your newly purchased prized possession on a non-specific firearms forum for no specific locale (Not limited to Indiana Gun Onwers). Serial number is in plain view and readable.
This option is pretty safe and secure. The firearm went from Manufacture to Dist, Dist to Retailer, Retailer to owner (for most cases). You're the original owner, therefore you know if you'd had reported it stolen or committed a crime with said object.
Now, if you bought a used gun. No matter from who (dealer, out of state - transferred to your ffl, FTF) you have no idea how many hands this product has been. No idea wether it has been stolen or used in a crime. This changes things, as there are sites to check serials for stolen firearms. All stolen firearms my not be listed, but all it takes is one to be found on such a list. Then the owner of said firearm is gonna have to answer some questions and lose his/her firearm.
Don't think that someone who lost a firearm wouldn't check serials with a like model gun which has just been posted on a forum. Said person reports he just saw it on some site and the process begins.
Or how about LE personnal looking at such photo's in their off-time/on-time? Recognizing a model and running the serial?
Don't think it could happen?
Who would be capable of 'running' these numbers? If they were ran, what information could be discovered from this? Name(s)? Address that was used on the form when buying it? Shop who sold it? What other private details? State? Other information about the locale? Information about the individual? What does a serial number of a firearm, assuming you're the original owner actually tell the person looking it up? I doubt there is purely a database that simply says 'Reported stolen' or 'Not reported stolen', I'd imagine there is more details then just that. Right?
Info probably varies from case to case.
I ask because it's not like it's unheard of for people to abuse their powers. Maybe "HotGirlWithGuns1911" (I don't think this is actually a real member... haha) posts pictures of her new.. whatever. Then some sleezy person with access to look up such things runs her serial number. Oh hey, "HotGirlWithGuns1911" lives 40 miles away, or her real name is this, or whatever... See where I am getting at?
Sh*t happens all the time, so why take the chance? Some people don't have the means to fight such a battle.