I did one year, and got caught pretty easily. :rofl1:
My mom had to pick my dad up from work one night, so it was my brother's brilliant idea to sneak in their closet and look at what they had gotten us. My mom was smart though and expected it from us, so she had set something in front of the door so that if it was out of place when she got home, she'd know we had been in there.
My mom got home, and asked if we had been in her room. Finally it came out that my brother had been snooping, but I managed to go uncaught, my mom thought our older sister had snooped with him (and she was like, 20 at the time, lol). And then my brother ratted me out.
I didn't mind not having the surprise (I just like unwrapping things, lol), but that was the last time I snooped.