That's gonna mean alot more Volcaronas and Charizards

I woUldnt really care, I never use the move

and now that I think about it, has a move ever been removed at some point in the series? would that ever work?

why does Smogon not just ban it I wonder

I'd be happy. I tend not to use it, but it bothers me that I have to worry about everyone else using it. Spikes, Toxic Spikes and Sticky Web are ok (the two spike moves more so than web), but rocks suck.

I mean, it can take away up to half of a Pokemon's HP just by having them switch in? Fuck you, Roark. Why couldn't you just give us Rock Tomb instead?

why does Smogon not just ban it I wonder

The move is undeniably overcentralizing (which is why some stuff is banned), but after having a Stealth Rock-less meta in Gen 5, people found out that it's a necessary evil. Without Stealth Rocks, Multiscale Dragonite was guaranteed a safe Dragon Dance, Kyurem-B would become Uber, Charizard and Articuno still weren't viable, and Volcarona was
debated to be broken as well. You would now need a Pokemon to check each threat if Stealth Rocks were gone and that limits team-building. It checks a lot of Pokemon. Now, imagine Talonflame coming in for free...

If they treated entry hazards like screens/weather and put a turn limit, then it would be fine.

I actually like that idea a lot.