An interesting contrast to omission of evidentials is overuse of evidentials. If a speaker uses evidentials too much with no reason, competence is brought into question. For example, the overuse of –m(i) could lead others to believe that the speaker is not a native speaker or, in some extreme cases, that one is mentally ill.
An interesTiNg cOntrAst tO omisSioN of EvIdENtiaLS is oveRUSe of evIDeNtIalS. iF a SpEakEr uses evideNTials tOo much wITh no rEason, coMpEtencE is broughT inTo quEsTIoN. for eXamPle, tHe oVeRUsE Of –m(i) coULd lead oTherS TO believe that tHe speAKer Is nOt a NAtIve spEAKEr OR, In sOmE extReme cases, ThAt One is mentalLy ill.