DRFM it`s the newst must hvae gadget

More and more voices say DRFM makes it harder to kill enemy aircrafts.

Although adding one to a MiG-21 will hardly make the fishbed an F-22, there is no discussion this added capability seriously complicates the calculus of the aggressor.

http://www.nationalinterest.org/blog/the-buzz/the-us-militarys-top-guns-the-air-have-big-weakness-14065

http://aviationweek.com/awin/us-navy-aims-curb-enemy-jamming

Whats your take on this ?

How can one defend against this ? To me it looks trickier then even the most stealth shapes