Abnormal hunger from GHRP's is not really desirable, in most of cases it means overdosing. Also person did not eat for a while his ghrelin may be high already, adding GHRP's to that is like adding oil to fire.
GHRP's also need decent thyroid function to work well, also they incease t4-t3 conversion and if ones thyroid is sluggish he'll end up with depleted ft4 levelsand after that GHRP's will not work and they will be beating dead meat.
Also is noted that overdosing GHRP's can deplete GH storages, and quite few folks had LOWER IGF levels as result of too high GHRP's dosages.