Penalty for players leaving live chess games?

One frustrating aspect of the live games is when opponents are severely losing and leave the game, but do not resign, players are left waiting around for the game to end.  there's a message saying that player might be penalized for repeated disconnections, but I'm wondering how many times can they do that before their account is suspended?  Often I'll have that happen to me and then I click to that player's bio and of course I see other comments about players experiencing the same problems.  Those players should not be able to play live games.  What do people think?  Leave your comments for Chess.com.