If you think that (wanting) politeness is a sign of oppression,

But I never said that. Indeed, what I did say is almost identical to what you've quoted from Wikipedia. Vis. From the very post to which you responded.

"Etiquette" is a nebulous, subjective concept who's definition varies from: culture to culture; country to country; person to person; and even by the mood of the person judging. In some societies, showing the soles of one feet is considered "impolite", or worse. In others, baring ones arms in public is "offensive". Should we be bound by those definitions in our general lives, because someone somewhere decided that was the case?

I never use all caps. Not in respect of that illogical usenet meme, but because I find it hard to read, and it looses its impact.

I do occasionally use a few words in caps for emphasis. A practice wildly used in literature, media and correspondence, through out all languages and cultures.

I was not wrong to put 6 words in caps. Those judging me were wrong to equate that use with the usenet 'all caps is shouting' meme.

(And IMO for subscribing to that illogical meme in the first place; but that's subjective.)