Permanent Map Markers

So what's been bugging me lately is how I've been placed against teemo fairly often and I know where the mushrooms are but sometimes I'm too late to alert my teammates. I think there should be map markers like pings and basically it tells you and/or your team that there's something there like a teemo mushroom, pink ward, and you can also gesture your team to keep away from your lane. You can also see them visually in game and not just on the map just incase its more specific. If they get annoying you can add a feature to vote to delete said ping.

TL;DR Riot should add permanent-ish map pings for information on wards, teemo mushrooms, and if you want a gank or not. also there should be a vote to remove permanent permanent ping on minimap incase it gets annoying ie. wall of permanent pings.