This isn't much of a diary as it is a public service announcement.
It is illegal to park a Hummer overnight in Seattle.
Seattle has a city ordinance declaring it illegal to park any vehicle over 80 inches in width between the hours of midnight and 6am, unless in a manufacturing or industrial area. H2 Hummers are actually 81 and a half inches wide. See this site for more details.
To report parking violations in the city of Seattle, call 206-625-5011.