Jon Gosselin Photogs Be Warned I Shoot to Scare

9/23/2013 5:15 PM PDT BY TMZ STAFF

Jon Gosselin whipped out his handgun and fired a warning shot when a photog wandered onto his property, and it totally worked ... cause the pap bolted!

So, just in case you needed a reason -- besides the obvious -- don't go to Jon Gosselin's house.