I second superguy. I travel btw. OH & DC and always carry my radar detector with me in my carry-on and, no one has even raised an eyebrow or confiscate it so far!
These are illegal in VA/DC and you will be fined only if you use it. Am not sure what they will do if I carry it along wherever I go, but not use it!
Originally Posted by Superguy
I've never had any problems with it either. Just sat in my carry on and never got a second look.
I would advise you to be careful if you travel to DC or VA, though, as they're illegal there and are subject to fines and/or confiscation.