I actually like mage supports on my team.

They allow me to go physical damage in the toplane if the rest of my team already did and they also do a lot of damage in general. I could see how it would be annoying as an ADC though, having all that lack of peel and constant kill "securing" ( wink wink, nudge, nudge ).

Just build a sightstone. It's just 800 gold and you should have enough of that getting all those kills for yourself.