If you pass the custom by foot, you almost guarantee WON'T be checked.
Just remember don't bring those fansy, new looking carrying bag.
It is like you buying something expensive, and tell those officer to "check and tax me, kkthk"

But if you drive Msia Car, and coming back Msia. Most important also don't show any fansy carrying bag. Most of the time they will check those Msia car one. Just dont let them see.

ya... they are too busy to check... busy standing there...

Hope I will be able to get one next weeks, sign the cheapest plan:)