Supports don't need a sight stone if.....

https://i.imgflip.com/jf0e4.jpg

But... but... How do I get my free gold and XP?

http://24.media.tumblr.com/b8731b40c65edd821ed567524fbda846/tumblr_mrwl4kXPkI1s1g57wo1_500.gif

You don't need a sightstone when you are playing pure AD Darius supp.

I remember playing for the first time as a Support with my Diamond/Platinum friend. He questioned me on why I didn't take SightStone. I told him my three reasons:

1. Even with the upgrades with other support items, I don't see the need. (its a personal choice)
2. I've won more by getting items that increase my abilities, abilities that help keep my team alive like heals and shields.
3. I'd be fine with it, but they have yet to make a jungle item that also allows junglers to take wards.

I'd be much safer if there was a item for junglers to carry wards and still gain bonus AD or AP but... I can't see anyone asking for that. In a logical sense, the support can only ward up to 3 times. And the only one that benefits from going into the jungle is Bard.

you mean:

"they don't use it ever."

?