In a e-commerce class online and the discussion was internet marketing and the conversation quickly turned black hat when the prof (he maintains the servers/web/blogs) mention link spam/injection, etc. All the other business owners/managers chimed in and I was the (proud) lone ranger in the room. In defending what we do, I was asked where do we draw the line in our black hat efforts. So I thought I would ask some of the questions I was asked and see what others think. So would you drop links via injection or do you consider that illegal (he says it is) or do you just stick to spamming links? Would you report someone who was doing something like link injection to defend your earnings or do you not worry about it and try to out rank them? So any feedback would be appreciated and may help me maintain an A average.