Can someone explain hacking to me?

Sorry to sound stupid but I have a problem that I think one of you guys might be able to help me with.

I am/was a member of an MSN group which mysteriously disappeared a couple of days ago. Now I am fairly sure that the manager just deleted it but he has decided to bluff his way out and claim a hacker did it.

Alledgely, someone hacked into his and his wife's MSN account and deleted them both. Now I've no doubt that this is possible. I don't want to know how thank you, BUT he would have us believe that one of the other members has done it.

I don't wish to be rude about me or my fellow board members but it's a site for Stay at home mums and their babies. Quite frankly I've only just learnt how to turn my computer on and most of the other members are the same.

He has informed us that anyone can hack, you only need to search on google and you'll be told how to do it. I find it hard to imagine MSN have such poor security.

Can anyone help either by telling me he's right (I'm prepared to be prooved wrong) or better still nailing the pillock.

Thanking you in advance