They come and go dependent. Written language is a method of communication - things like spelling, punctuation and capitalization are, to me, just elements of that method which can be manipulated, altered, or simply invoked to help convey shades of meaning in the same way as the use of bold, italics, third/first/&c. person, interjections, quotations, and etc are (more commonly) accepted and used to. It would take a high level review of multiple of my published poems to maybe perceive the "big picture" of how I like to fuck with capitals and punctuation/lack-thereof, but it's a been long term fuckwiddit thing I like to do. I imagine for a non-native English speaker it may make the reading more difficult. I guess my real point is that if I misspell a word, it's more likely on purpose than not. Same with using incorrect grammar or unusual punctuation.