Yes, I am indubitably unreasonable because:
a) This issue is about as inconsequential as it's possible to be and;
b) It should probably be in Pedants' Corner.
But why, why, why do people keep typing a space after the first bracket of a parenthesis? I see it on here at least 50% of the time brackets are used. It's serves no purpose, makes the whole parenthesis look uneven and often leaves orphaned open-bracket symbols forlornly marooned at the end of a line of text. Above all, it's just wrong in every way.
Why have people decided this is de rigueur all of a sudden? Or is it an unfortunate effect of autocorrect?
And, parenthetically, I get just as upset about spaces being left before question marks and exclamation marks. Why ???!!!