I have. I do pre-wash all my fabrics so I can't say whether that makes a difference or not. The rick-rack washes just fine. Sometimes it will curl up a bit around the edges. If it really bothers you, you can press it down with a warm iron.
The only reason I've heard not to use it is because some people do not like synthetic fibers for baby quilts since they melt instead of burn meaning that potentially they could melt & stick to the baby's skin. I don't use much rick-rack anyways so I don't really worry about that. The melting feature is a bonus for sewing because when you burn the ends of the rick-rack, it will melt them just a little bit & keep them from fraying with use/sewing/washing. I use a short stitch length to attach it (1.5mm). It makes it extra secure.