<p>My thoughts first on what one does if one is writing a question:</p>

<ul>
<li><p>If you're quoting a paper, <em>you should quote it verbatim</em> and then explain why the original is wrong (including quoting the correct statement from the earlier reference). If you really want to make it obvious, include "[<em>sic</em>]" inside the quote, immediately after the part that's wrong to highlight that's what the original <em>says</em>, which will alert people to the fact that it probably isn't right, and have them looking for the explanation of the issue.</p></li>
<li><p>If you're not making a direct quote you don't necessarily need to give the wrong statement but you should probably mention the issue to save people some confusion.</p></li>
</ul>

<p>Now, if one is pondering editing a question:</p>

<ul>
<li>I think the same conventions apply, except I'd lean toward doing it in comments and giving the OP the opportunity to correct their own post first.</li>
</ul>
