This would depend on what your scope of practice will be or you are anticipating to be. If you want a well rounded MSW degree that focuses on administration of case management, I don't think it would be a problem doing an online program.
The other side of the coin, if you are wanting to do ANYTHING clinical (psychotherapy), you need to be present at a physical campus. There is nothing that current online learning provides that can simulate learning group dynamics in real time, and one-on-one interaction. There is so many variables involved in this process. Of course I am not saying it COULDN'T be done, and you may be able to get by and get a great job after graduation, but in the end, you would be doing your self a professional dis-service and at-risk to being a danger to clients with your online learned clinical abilities.
I certainly wouldn't respect an online clinical program. No offense, just my .02.