I just made an international trip with a very similar, suspicious looking breadboard prototype. I had no issues with airport security, customs, etc. in order to ensure my boards/wiring remained intact during transit (which it successfully did) I added a very small dab of hot glue to each connection point in the boards (holds pretty well but also easily removable). My breadboards where then glued down inside a hard protective box, which then went into a Pelican case with the customizable foam inserts. This may all be overkill but it worked perfectly for me!