Well I personally don't consider it disrespectful, so you'd have to ask the folks who are offended by it. They might give you a better insight on why they don't like it.
But I think the reason some folks consider it shouting is cause when someone types a long message on a website, message board, or email and they wanna highlight certain points in they message, they usually put those important points in either capital letters, bold letters, or underline it.
I know sometimes when I write long messages on the siccness, I occasionally type words or sentences that I really wanna stress, in capital letters or bold letters. And this could be the reason it's considered shouting, cause some people might interpret it as you REALLY stressing and shouting everything you want to say.
Other folks on the other hand, may think a person who types in all caps is just immature and childish, kinda the same way a person WhO tYpEs LiKe ThIs wOuLd Be ViEwEd. Not saying I think like that or anything, but there are some folks out there who actually think this way, like those people on those technical sites you go to.
Let me show you an example and I'll retype what I wrote above and switch it up a little...
Well I personally DON'T CONSIDER IT disrespectful, so you'd have to ask the folks who are OFFENDED BY IT. They might give you a better insight on WHY THEY DON'T like it.
But I think the reason some folks CONSIDER IT SHOUTING is cause when someone types a long message ON A WEBSITE, message board, or email and they wanna highlight CERTAIN POINTS in they message, they usually put those important points in either CAPITAL LETTERS, BOLD LETTERS, or underline it.
I know sometimes when I WRITE LONG MESSAGES on the siccness, I occasionally type words or sentences that I REALLY WANNA stress, in capital letters or bold letters. And this could be the REASON IT'S CONSIDERED shouting, cause some people might interpret it as YOU REALLY STRESSING and shouting everything you want TO SAY.
Other folks on the OTHER HAND, may think a person who types IN ALL CAPS is just immature and CHILDISH, kinda the same way a person WhO tYpEs LiKe ThIs wOuLd Be ViEwEd. Not saying I think like that or anything, but there are some folks out there who actually THINK THIS WAY, like those people on those technical sites you GO TO.