IIRC in most scenarios the empty pylon has a higher signature than the pylon+weapon due to the exposed face/catches. It would seem more desirable to have one-use eject able pylons - the same way Colt had hundreds of reinforced cardboard/tinfoil tanks for the Jag - and at an even more horrendous cost to the taxpayer.
Mind you, if you hung disposable tanks on the 35B/C and jettisoned them on the edge of enemy cover, they'd might have a chance of making a target beyond the littoral before having to turn for home.
Roll on the UCAV tanker.........