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 particular server with 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 which leveling methods are against the rules. Thank you!