Does Riot punish obvious intentional trolls?

I just had a game where Syndra, Nunu and Alistar (Mid, Top, Bot) all switched to Smite at the last moment, then proceeded to follow me around the jungle for the first few minutes. I was duoing with a friend, she was playing support Orianna. So I decided to just go bot lane with her and whatever happens, happens. They continued to troll by running around the map really doing nothing productive, then because it probably seemed hilarious to them, like some big joke, they acted like they were innocent in chat. So I'm just curious about how serious Riot is with punishing this type of trolling.
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