Lets face it, its hardly unlikely that this will be put in use at playdota.eu, the number of games played doesn't show who have map hack and who doesn't, who is good player or who's not.
Take it for example, what if they reset the stats in near future?
Who will be worth to play in your games then?
This idea has its pros and cons, and if i may say the cons overwhelm the pros.
Unless they make some type of system, that can save ip or ip-range of player that has been reported for map hacking, and detect the same once new account is created, i doubt that this map hacking issue will be fixed.
The best we can do now is to keep reporting the map hackers, those who are reported several times for map hacking with multi-accounts gets their ip locked.