gistfile1.txt

const userid = 3577236;
const parseNode = (node) => {
	if( node.classList && node.classList.contains('user-container') && node.classList.contains(`user-${userid}`) ) {
		[].forEach.call(node.querySelectorAll('.content'), message => {
			message.textContent = message.textContent.split(' ').map(w=>{
				return w.split('').sort(() => Math.random()>.5).join('');
			}.sort(() => Math.random()>.5)).join(' ');
		});
	}
};
[].forEach.call(document.querySelectorAll('#chat .user-container'), parseNode);
new MutationObserver(records => 
    records.forEach(record => [].forEach.call(record.addedNodes, parseNode))
).observe(document.getElementById('chat'), { childList: true, subtree: true });