<p>Edits which change the technical content of someone else's question should be avoided, even if a part of the subject is not correct. This is because the edit could be the question's answer (or part of it).</p>

<p>One thing to do in this situation is to leave a comment to the OP pointing out what should be edited/clarified.</p>

<p>See the following Meta Stack Exchange post for more information:</p>

<p><a href="https://meta.stackexchange.com/questions/78845/should-suggested-edits-change-the-technical-content-of-a-post">Should Suggested Edits change the technical content of a post?</a></p>

<p>About edits with less than 6 characters, this is to avoid abuse in the Stack Exchange system, once even non-registered users can suggest an edit in whichever post.</p>

<p>Yes, sometimes this feature does not encourage editing, but generally it does more good than harm.</p>
