Hey there Dionysus,
Live and let live is our motto here. No need to apologize. There is no witch hunt, no one wants to denounce you as a fraud or alienate you in any way. We're happy you joined the site!
You can't really blame Siveressa though (she not he) for calling this out to our attention.
It just seems strange that you're "asking for feedback" on other people's articles from elsewhere. Even if you couldnt figure out the linking aspect of it all, a simple note in comments or the actual submission--"this is an article i saw on website x written by author y"--or something, would have been appropriate and easy.
Another insight into the strange thoughts and ideas that cross my mind. That's all for today. My desire to write has been sated for now.
Not to get into any semantics, but that sentence ^ certainly does imply its your own work. Otherwise, why not say, "thats all for today, my desire to copy/paste is sated for now"

Also, in Gaming on a Budget submission, you commented,
"The idea came to me because I've had to make do with only my benefits....."
Well, the idea didn't really come to you, its someone else's work, but ok, whatever.
Lastly, was this submission necessary? Title: "Kittens", Main Body of Sub: "FU". C'mon, really?
I think we can all agree to let this go and move on! Going forward, just please let readers know if it is original material or from somewhere/someone else.
Let us indeed resolve this w/o any further pain, as you say.
*POOF* all is resolved.
Don't feel like you're not welcome, you most certainly are! Looking forward to further ideas and interesting articles from you!