Valve has added so many new things in The International 2016 Battle Pass; everyone is leveling up by doing quests and challenges, but it's really hard to achieve level high levels without buying the levels with real money. But yesterday, I started seeing strange things that people are doing a cheap trick to get level up fast.

What they are doing is, creating a private lobby with friends and then searching on a particular server with a particular language (like Chinese) so the two parties will get match against each other and then trade wins, taking turns completing quests. My question is, isn't this bannable? If I try the same trick, will I get banned from playing Dota? I'm not sure which leveling methods are against the rules. Thank you!