Hm.. yes, it would be quite dangerous for you and your server, but there are tons of servers now and the chance is by 5% that they catch you. If you are using a "Hamachi" server it's not dangerous, because they can't get on you're Metin2 HP but first at all you need to make a Metin2 Privat server hp that connect's to your hamachi IP just like this example:
now thats mine and you can't get on it because your hamachi's not connected to my IP so yeah I hope you understand me.