Red Trink Vs. Teemo Shroom

I play a lot of support so I usually end up getting red trink once I get my sightstone. The unfortunate times I have a on the enemy team I end up having to sweep a lot, and upgrade to stage 3 much sooner. An annoying part of discovering the shrooms is that they are not disabled and one of my fellow champs steps over them and blows them up. This tends to happen a lot to the poor melee champs in the group who don't have a choice but get close to destroy the nasty fungus. I really think red trink should disable shrooms, if you think it's op consider this. You have to be lucky to find one, and it's only for a few seconds.