This is an oldie, but goodie, taught to me when I was just a wee child by my dad. You can remove most of your vehicle's trim with your dentist's best friend...dental floss!
Badges, generally, are stuck to the car using two methods, posts or adhesive tape. Post-mounted badges are easy to remove since they only require a nut driver or the right sized socket, but I've seen tons of paintwork damage done by well meaning folks using metal paint scrapers to get their adhesive badges off. If it's good enough for 'your' enamel, then floss is definitely good enough for your car's as well.
This takes only seconds and makes you wonder why you never thought of it before :)
Step 1: Visit Dentist...clean Teeth, Score Free Floss!
First, go ahead and take this opportunity to go visit your favorite dentist and get those chompers checked up...they'll love you for it. Your dentist will reward your diligence by giving you a shiny new toothbrush and some free floss. I'm sure they won't mind if you re-purpose a little for this job! Any kind will do just fine.