Doubt if anyone "stole" your blinker lens...I've read many a thread here of folks seeing them fly off the car whilst driving. Not sure how they are attached, but it's not a tank-like install.

Are you referring to OEM amber or the clears? I think some cheapo clears have issues with staying put as well...

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car