So I can do it myself and be more confident with my IED attack and not waste my time finding a guy or wasting a IED because the other guy took 1 year to activate it.
+1/-1 Removing the human element (and the need of using discord) to blow shit up definitely makes IEDs more reliable, but could remove a potential RP source.
I say add the detonator, but leave the radio method if you can so people have the choice of saving resources making a detonator to rely on a player instead.