It's much easier than that. It's simply contempt and disrespect to the reader.
You are the only one to say this after thousands of post over many years.
The fact is that my fingers are so stiff that i hit the wrong key on about every 3rd or 4th word, and must do much correcting, and beside feeling uncomfortable even capitalizing references to myself, as if i was important, anything i can do to save time helps. And i would find no problem with anyone else using "i" for themselves, as it is no problem to see what it means.
Sorry if it offends you.