AIBU to wonder why people make up their own personal rules for punctuation when this usually only has the effect of obfuscating what they're trying to say? (NB I'm not talking about established writers who have done this like James Joyce and e e cummings.)
I'm thinking of things like random spaces before exclamation or question marks, unnecessary capital letters, words in quotation marks when they have no need to be, and (my pet peeve) completely eshewing punctuation in favour of an ersatz stream-of-consciousness style with loosely-connected (or completely incoherent) thoughts separated by an indiscriminate number of dots.
Nobody suddenly decides they're going to start writing 1.2 when they actually mean 12, or 3 x 3 = 6 when they mean 3 + 3, so why do some people apparently think they should use punctuation differently to everybody else?