When we talk about what inbound link building is, we are talking about the fact that we can allow people to leave their links on our sites so that some of our traffic can know where other great sites are located and which ones we recommend. That last part is the most important part because you do not want to have inbound link building to websites that you are not particularity a fan of even if they are willing to put your site on theirs. Just be safe with your site and think before you act and you should be fine.