If I have a friend at the firm I want to apply to, doesn’t it make sense to go through the friend as an “insider”?

Answer:

Even if your resume is passed along to the appropriate contacts at the firm, it is unlikely that your friend – a current employee of the firm who should be focused on his/her billables and work product – will have the time, inclination, or will to keep following up with the firm’s recruiting department to make sure that your candidacy is actually considered. With recruiting departments receiving hundreds—if not more—of resumes at a time, it can be difficult to ensure that a resume receives due attention unless the reviewer is followed up with regularly and at the right times. So while your friend may fulfill his/her promise of actually sending your resume to the right person at the firm at the outset, it may mean little if your resume is not actually reviewed with enough attention at the time that the firm could actually hire.
Finally, should you actually begin to interview at the firm to which your friend made the introduction, and you arrive at the offer stage, it is difficult to not have a third party advocating for you. Certainly your friend, an employee of the firm, will not be able to negotiate any terms (say salary or class year) with the firm that employs him/her. Moreover, because you may feel like your friend already did you a favor by “getting you in”, you may be hesitant to negotiate any terms yourself directly with the firm, for fear of asking for even more from the firm that employs your friend.
While it might seem like going through a friend is the best way to approach every firm, you should consider what your friend can and cannot do, and what will be in your best interest in the long-term.
Read Law Firms and Part-Time Attorneys - They Really Can Go Hand in Hand for more information.