A couple of points on userboxes: - If there's use to some userboxes, who's to determine which ones are and aren't acceptable? - Aren't there at least half a dozen other ways that people could round up votes for one cause or another, anyway; and wouldn't we just get "off-campus" userbox phenomena if we banned them here? At the risk of sounding like an anarchist (where's the userbox for "people who sometimes sound like anarchists?"), I say let them be. And those who delete them should be cited for vandalism (deleting copyrighted images is another matter entirely).
Now, about disruption. It seems to me a range of sins disrupt wikiefforts (and arguably also help them often): 1) Sins of hot-headedness - we sometimes get so emotional about subjects we care about that we forget to be reasonable 2) Sins of self-righteousness - we are so convinced that we know the truth that we close our minds to valid objections 3) Sins of subterfuge - we are deliberately pushing our point of view in more or less sneaky ways: POV forks, obfuscations, etc., using the credibility of Wikipedia to promote our pet causes 4) Sins of vandalism - we are deliberately trying to disrupt the Wikipedia enterprise in various ways
Those who commit 1) should notice that their blood pressure is rising and give themselves time off, but otherwise be easily forgiven. We want passionate people here. Those who commit 2) should lighten up a little and try to find more inspiration in standards of intellectual honesty. 3) have to make to make up their minds whether they want a soapbox or an encyclopedia. 4) should be booted out.