PoisonIvy wrote:
"I think they do more harm than good, and more than once I've been put off donating at all (on the street or otherwise) to charities who employ these guerilla-guilt practices."
You should notify these charities that you were put off donating to them by the tactic. If enough people call or write them to say that the dollars (or pounds or euros) are going elsewhere because of this, charities will think twice before employing these companies. As in all things, money talks.
Virg