Clearing wards?

So i was playing yesterday as support. I decided to put a pink ward in the enemy jungler cause...Our jungler already warded the river and i had to put the pink somewhere. Guess what happened.. NO ONE tried to clear the ward for the entire game. My adc took their red buff like 3 times. Im sure that his ward won our game. This little lonely pink ward next to the red buff.

Seriously people ward more. And clear the enemy wards if you want your red...