Originally Posted by ZachS
there are many many more dangerous things out there than only having a front brake. realize that there are risks, as have been well and accurately described here, and then do whatever you want.
Read up on the vehicle code in relation to bikes in your state before doing "whatever you want"....many state mandate that a rear brake capable of skidding a wheel is REQUIRED.
Last thing you need is getting hassled or getting a fine over not having a rear brake. Plus a lever, tektro caliper, and some cable/housing is not very pricey at all.