i often avoid capitals myself in informal writing, but to be fair, there's a valid argument that period is pretty small and can be hard to spot by itself for something as important as the statement separator . capital letters help with that somewhat, although it doesn't help that we've overloaded them for other things . putting a space before the period helps keep it more distinct, but i really wish our punctuation was better designed (right after we reform english spelling i guess ...) .

but i digress . whataboutism aside, what's the actual problem ?