<p>I think that whuber has covered the major issues just fine, but I think I can add a little bit of practical advice that may be useful.</p>

<p>As has been pointed out, there is a lot of material out there on various meta sites with advice and guidelines for when an edit should or should not be rejected for being too minor.</p>

<p>But when the rubber hits the road, and you're sitting there staring at a suggested edit, I initially found it difficult to synthesize it all into a rubric for what action to take. (I can approve edits on SO, but not here.)</p>

<p>What I have settled on is basically this:</p>

<ul>
<li>My threshold for when an edit is too minor is <strong>inversely related to the age of the question</strong>.</li>
<li>Before approving <strong>any</strong> edit, check if more could be done.</li>
</ul>

<p>If the question is very recent, I am more likely to let a minimal edit through. The older the question is, the higher my standards become. Obviously, I don't follow this literally: if a question was posted 3 seconds ago, I wouldn't approve a single capitalization fix! But if a question was posted within the last hour, and I see a suggested edit that only removes a "Thanks!" tagline, <strong>and</strong> I don't see anything else worthwhile to be done, I will generally approve it.</p>

<p>The reason I settled on this approach was because it seemed to me that the largest cost to editing questions is the fourth point that whuber lists: that the question is bumped to the top of the active list.</p>

<p>Personally, I haven't seen the revoting issue become a really widespread problem.</p>

<p>Also, if someone is making dozens or hundreds of minor edits, it will be obvious. You will very quickly say, "WTF? Why is the suggested edit queue filled with edits from this one user?" </p>

<p>(This happens pretty regularly on SO. For instance, someone will simply search for a commonly misspelled word in titles and just dive in.) </p>

<p>In those cases, I typically recommend rejecting them en masse (regardless of whether you agree with the validity of the edit) and raising the issue on meta. Massive serial editing ventures should be organized by the entire community, not a single individual.</p>
