Joe Jonas and Sophie Turner were trying to enjoy a relaxing afternoon of high-end shopping on Rodeo Drive in Beverly Hills when an animal-rights advocate had to ruin their spending spree!

A by-stander asks Sophie, as she and Joe are walking from boutique to boutique, why she thinks it's okay to wear real fur slides -- she's referring to some fuzzy pink slippers the Game Of Thrones actress wore back in April of last year during an outing in NYC.

The protester accuses Sophie of wearing dead animals and of not promoting compassion. Joe and Sophie stay straight-faced the entire time and refuse to answer -- though he looks PISSED and Sophie actually looks like she might start laughing. FAIL!