Having recently returned from a F Class RTW trip, I was stopped and questioned by Canada Customs at YVR and treated like a drug smuggler/high ranking organized crime boss (They asked to see my ticket and asked "who paid for my trip" and a bunch of other embarassing questions then x-rayed my bags.)

The reason that they told me was that I was young (20 years old), flew first class (asked to see my ticket), and went to so many places in such a short period of time.

Now I am thinking of using 3 RTW tickets at the same time (but don't know what to explain to customs/immigration when i return to Canada). Any tips on how not to get caught?

Ticket 1:
YVR-HKG-BKK-X/HKG-LHR-JFK-YVR

Ticket 2: (buy in BKK because CX/UA is cheap there !!)
BKK-X/HKG-YVR-JFK-LHR-HKG-BKK

Ticket 3:
BKK-X/HKG-LHR-JFK-YVR-HKG-BKK

Actual use of the tickets:
(Purpose: To go to HKG and visit friends/family/hangout etc. in between school breaks, with maybe some fun in London on the way back.)

Trip #1
Ticket 1: YVR-HKG (Stay 2 weeks) HKG-BKK (to pick up physical tickets 2 and 3 while in BKK [issued by TA 7 days before I arrive in BKK])
Ticket 2: BKK-X/HKG-YVR (School for 3.5 months)

Trip #2
Ticket 2:
YVR-JFK-LHR-HKG-BKK
Ticket 3:
BKK-X/HKG-LHR-JFK-YVR

Trip #3
Ticket 3:
YVR-HKG-BKK
Ticket 1:
BKK-X/HKG-LHR-JFK-YVR

Then the cycle repeats again each year...

All I hope is that the CX/UA RTW fare still exists and won't be discontinued in the near future !!