I like many others belong to at least one social group like facebook, myspace, etc... I have been noticing lately that user accounts for facebook have been getting cracked, then using the features on the site they spread messages to that users friends with advertisements mainly for cell phones like:

Hey thought you'd wanna know about this website giving away ringers to FB users for the next couple days..

Now I know that this has been going on at myspace for quite some time, but I was wondering, are these crackers being employed by the company they advertise, can the company get in trouble for this, etc...

If someone could shine some light on this subject for me that would be great thanks.