I say it is bad either way. Get her reading. F icq. Get her back on drugs if need be. Beat her if you must, but get her off the internet. Or...watch as things progress and what you thought was a good mariage falls apart and she runs off with an unemployed programmer she met online in a chat room.
Trust me dude, nothing good will come of it if she is chatting with anyone but family or friends that she already knows.