Hello Guest, welcome to Using English!
If the irregular absence of capital letters is to be regarded as an error, e.g. as in:
1. iago is one of william shakespeare's more interesting characters.
then perhaps we can say that the irregular presence of capital letters might also be regarded as an error, e.g. as in:
2. IagO is One of wIlliam SHakespeare's more Interesting chaRacters.
In practical terms, whether we misspell words or simply mispresent them, it will be taken as an error on a job application, etc.
(Unless of course the prospective employer likes irregular capital letters too.)