Edit: Apparently, this is a very, very mean ladybird. Boohoo. I should maybe killed it instead of photographing it.
Wikipedia says: "Worldwide routes of propagation of H. axyridis have been described with genetic markers in 2010. The populations in eastern and western North America originated from two independent introductions from the native range. The South American and African populations both originated independently from eastern North America. The European population also originated from eastern North America, but with substantial genetic admixture with individuals of the European biocontrol strain (estimated at about 40%).
Many people now view this species as a nuisance, partly due to their tendency to overwinter indoors and the unpleasant odor and stain left by their bodily fluid when frightened or squashed, as well as their tendency to bite humans. In Europe it is currently increasing to the detriment of indigenous species, its voracious appetite enabling it to out-compete and even eat other ladybirds. Native ladybird species have experienced often dramatic declines in abundance in areas invaded by H. axyridis.
In addition to its household pest status, it has been reported to be a minor agricultural pest contaminating crops of tender fruits and grapes in Iowa, Ohio, New York State, and Ontario. The contamination of grapes by this beetle has been found to alter the taste of wine."