<p>I'd say No in broad terms, but as usual much depends on the details. </p>

<p>Positively, substantial new information could help a thread considerably, but that should typically be added through comments or very possibly as part of an answer. </p>

<p>But what's substantial? For example, if someone edited a literature reference to add detail or to add a URL, that's an excellent contribution in my view. If the editor wanted to do that without claiming credit, that's fine too. </p>

<p>Negatively, the purpose of editing (see e.g. <a href="https://stats.meta.stackexchange.com/questions/2810/editing-questions-dos-and-donts">Editing questions: dos and don&#39;ts</a>) is essentially to clarify a question, including correcting trivial errors,  but not to amplify it. </p>

<p>The possibility of a misguided or incorrect edit being accepted by mistake exists always, independently of this issue, and is to be matched by a rollback and/or further editing. </p>
