It's a fine line between not being taken advantage of and having a useful site - links are what makes the internet what it is so we need them. In theold days of SEO there seemed to be a race to get as many inbound links as possible witha s few outbound links, but that seems to have changed. And before that all sites had a page of purely links, those seem to have mostly gone as well. Google may have succeeded in for a large part getting rid of link farms and paid for links.
It's all down to a nice balance and ensuring the outbound links are on topic and useful.