If someone going through customs has say two large suitcases (or more) or a sizable "Box" of something, it is advisable to go to the "Things to Declare
" line because there is about a 95% chance you WILL
be Re-directed to that line by the "Nothing to Declare
" line officer.
If you are bringing something you need to declare, it is advisable to go to the declare line on your own, you will be most likley be treated fairly.
Remember, the Customs officers do this for a living every day and have a pretty good idea of what people are doing.
Common sense, and RESPECT will get you through with no problems. maybe a little duty paid , but no problems.
Who needs problems when you are just looking to enjoy your vacation.