To Cleanse or not to Cleanse?

One of my coworkers has been talking about doing the Master Cleanse, and I'm considering doing it as well.  For moral support.

Now, I know there's a lot of benefits to doing a cleanse, but there's also a lot of potential health pitfalls.  Doing a cleanse and getting all the fatty, rich, unhealthy foods typical of the American diet would probably be very beneficial.  Going almost 2 weeks without eating solid food is a bit off-putting, mentally and physically.  Losing all the existing bacteria in your stomach doesn't seem very pleasant. And then there's the side effects of doing a cleanse....

I'm kind of attached to the bacteria in my stomach, I think its done a pretty good job.  Maybe I can find a toned down cleanse.  One that's not quite so drastic.... Or maybe I shouldn't be a wimp, and just do it.