Potential sightstone buff: recharging wards

I had a thought the other night. As a support main, the number of times I'm out in the rift and I drop three wards in an area is pretty high. This then results in me having 1 ward left over, which leads to a little dilemma. Do I go back to recharge my sightstone? Most of the time I don't have enough gold to buy an item so it's a small waste, plus then my team is lacking at least one person for a while. So I started thinking about possible ways to fix this when it hit me: what if clearing wards with a red trinket gave you one more ward charge?

Obviously I'm not a balance expert so the opinions of others is appreciated, positive or negative. I think it would be nice, give additional incentive to clear wards, and possibly even give incentive to let supports clear wards instead of stealing it for that 10 Good.

(Also for the record I did see that comment that other person made on that other ruby sightstone thread with the same idea but I wanted to make this thread before I read it)