According to the developer in an official forum post, “They’re doing this through a form of Distributed Denial of Service attack and not a hack. As of yesterday’s hotfix, we’ve put some changes in place that prevent games from dying. Players in a targeted game will still experience lag and possibly be disconnected, but the client should now be able to reconnect to the game automatically and resume where it left off.”
Riot Games then advised, “To spell this out a little, if your client suddenly lags and presents you with a ‘Connecting screen’ you should allow it to try its magic and reconnect you to the game. When it is successful this will allow you to rejoin the battle much quicker without reloading the client.”
They also promised that once the attackers were identified, they’d be prosecuted to the furthest extent of the law.
“Additionally we are pursuing legal avenues and working with the proper authorities,” the developer avowed, “We’re doing everything we can to implement short- and long-term solutions to fight these types of activities. When someone’s intentionally ruining the experience of other players, we take it very seriously.”
Stay tuned.