I hate “guilt-by-association” arguments. They are generally bereft of logic, and are used when there is no real issue to debate.
Some anti-Perry posters have been posting a picture without explanation, where Perry is shown signing a bill, with some ACORN members in the background. And they were claiming some mysterious close relationship between ACORN and Perry.
This article explains in detail what the bill was and how it came about — as a result of a natural disaster and how some real estate “ownership” worked in Texas.