All my locks are keyed alike - tailgate, full doors, and half doors. Soft top only - glovebox and console locked, anything that is WORTH anything is locked behind my tailgate in my Tuffy Security Deck, including my registration & insurance card. I have a Sparco "fire extinguisher" in my glovebox and a pair of decent sunglasses in the console; neither is particularly irreplaceable. Doors are "locked" to the hinges, both half and full; I run wheel locks too, including the spare...
Having grown up in New Jersey and personally known a high line car thief, I know that there is virtually NOTHING that will stop a determined thief from getting YOUR vehicle, or anything INSIDE your vehicle - PERIOD! Your goal should be to slow down the "snatch & grab" douchebags, a high line pro knows ALL the tricks for each & every vehicle he is "casing"...
Do I lock my doors? Yep - when I'm DRIVING - only because I want to lessen the odds of a door springing open in the event of a collision, and to slow down a car-jacker if I'm sitting at a traffic light. And yeah, I HAVE dealt with an attempted car-jacker back in 1976 in Harlem NY - my doors were locked and all my windows were down in my '65 Mustang. He tried to get in at a stop light - if you happen to meet an African American gentleman in Harlem with a flattened out/broken nose from having met the bidness end of the Louisville Slugger I had on the back seat, tell him I said Hi! He'd be in his '60's now, for the record; it WAS kinda funny seeing his IMMEDIATE change of heart - from "I'm-a steal this white guy's car" to "I'm-a go home and put an ice pack on this broken nose", LOL...