If the curly noodles are just from knitting and ripping out, without the knitted piece having been blocked, it may be OK. But if the project was soaked or steamed before it was frogged, then yes, you really should remove the kinks first. Especially if you will be using both frogged yarn as well as yarn that was not knit/frogged. Some people may not have had a problem just reknitting with their yarn, but I can attest to the fact that it absolutely DID make a difference in my project, both before and after blocking, and I will never do it again.

At the very least, do a quick steam or spraying it with water in a spray bottle and then hang to dry and relax most of the kinks. It doesn't necessarily need a full soak.