Am 31.12.2016 um 15:17 schrieb mayqel qunenoS:

Some time ago I decided to stop using question marks, because I decided
that they are unnecessary.

Why did you decide that. Don't you think it looks strange. Would it look strange in English.

On the other hand, I believe that other punctuation marks are definitely
necessary.

Not really
It's the same in English
When you write one line per phrase it's clear the sentence is over
If you have longer phrases that are longer than one line and may jump into the following line you can just leave a space to mark a ne phrase like I am doing now

This is the next phrase

So saying that punctuation is necessary contradicts your saying that the qustion mark is not :-)

Well, technically, line endings are also punctuation. But capitalization, alternate typefaces, horizontal and vertical spacing, and marks are all used to improve the readability of writing, refined* over thousands of years. Earlier writing often eschewed punctuation, showing it's not strictly necessary. But it helps a lot. Messing around with it is a disservice to your readers.

* But the modern ignorance of the difference between text figures and lining figures is nothing short of a crime!

-- 
SuStel
http://trimboli.name