Noch unfertig!

// ==UserScript==
// @name        get blizzard-forum entry to clipboard
// @namespace   rldml
// @include     /^https?://eu\.battle\.net/d3/(de|en)/forum/.*$/
// @version     1
// @grant       none
// ==/UserScript==
 
var varDebug = true;
var varSinglePost;
var ATag
var varStringToCopy = "Test";
var varPostList = document.getElementById('post-list');
 
if (varDebug == true) console.log ('GetElementByID: varPostList = ' + varPostList);
 
for (i=0; i<varPostList.children.length; i++)
{
	varSinglePost = varPostList.children[i];
	if (varDebug == true) console.log('Select Post No. ' + i + ' with Id ' + varSinglePost.getAttribute('data-post-id') + ': ' + varSinglePost);
	varStringToCopy = varSinglePost.children[1].children[1].children[0].innerHTML;
	varATag = document.createElement('a');
	varATag.setAttribute('href','javascript:copyToClipboard(\''+varStringToCopy+'\');');
	varATag.setAttribute('id','GM' + varSinglePost.getAttribute('data-post-id'));
	varATag.innerHTML = "COPY";
	varSinglePost.children[1].children[2].children[0].appendChild(varATag);
}
 
varScript = document.createElement('script');
varScript.setAttribute('type','text/javascript');
varScript.innerHTML = "function copyToClipboard(text) {prompt('Ctrl+c, Enter', text);}";
varPostList.appendChild(varScript);

tablefunctions.js

function convertText(varText)
{
    i = 0;
    do {
        FoundSomething = false;
        positionBR = -1;
        positionBR = varText.indexOf("<br");
        //console.log(position);
        if (positionBR != -1)
        {
            FoundSomething = true;
            positionBREnd = varText.indexOf(">", positionBR) + 1;
            Substring = varText.substring(positionBR, positionBREnd);
            varText = varText.replace(Substring, "\\\\ ");
        }
        positionBlockQuote = -1;
        positionBlockQuote = varText.indexOf("<blockquote");
        if (positionBlockQuote != -1)
        {
            FoundSomething = true;
            BlockQuoteCounter = 0;
            positionBlockQuote2 = varText.indexOf(">", positionBlockQuote) + 1;
            positionBlockQuote3 = positionBlockQuote2;
            BlockQuoteEndFound = false;
            do {
                positionNextBlockQuote = varText.indexOf("<blockquote", positionBlockQuote2);
                positionBlockQuoteEnd = varText.indexOf("</blockquote>", positionBlockQuote2);
                if (positionNextBlockQuote != -1 && positionNextBlockQuote < positionBlockQuoteEnd)
                {
                    varText = varText.replace("</blockquote>", "((/BLOCKQUOTE))");
                    BlockQuoteCounter++;
                } else
                {
                    varText = varText.replace("</blockquote>", "\n\n");
                    for (i = BlockQuoteCounter; i > 0; i--)
                    {
                        varText = varText.replace("((/BLOCKQUOTE))", "</blockquote>");
                    }
                    BlockQuoteEndFound = true;
                }
            } while (BlockQuoteEndFound == false);
            Substring = varText.substring(positionBlockQuote, positionBlockQuote3);
            varText = varText.replace(Substring, "> ");
        }
        positionDiv = -1;
        positionDiv = varText.indexOf("<div");
        if (positionDiv != -1)
        {
            FoundSomething = true;
            positionDivEnd = varText.indexOf(">", positionDiv) + 1;
            Substring = varText.substring(positionDiv, positionDivEnd);
            varText = varText.replace(Substring, " ");
        }
        positionDivE = -1;
        positionDivE = varText.indexOf("</div>");
        if (positionDivE != -1)
        {
            FoundSomething = true;
            varText = varText.replace("</div>", "");
        }
        console.log(varText);
        i++;
        //console.log(i);
    }
    while (FoundSomething == true);
    return varText;
}
 
console.log("Los gehts!");
varContent = convertText(document.getElementById("demo2").innerHTML);
document.getElementById("demo2").innerHTML = varContent;
console.log("Fertig!");

Teststring: