The Google Voice number I chose with was bombarded with calls from collections agencies. A freed number is more likely to come from someone who has abandoned their service due to non-payment. Google should have checked for this before offering these numbers. Based on what they've already built screening for collections calls would've been well within what they could do.
When I attempted to disable the number the process was extremely frustrating. I couldn't simply turn it off. I had to reassign it to another valid phone number. (No thanks.) I eventually got around this by following their suggestion to disable several AT&T forwarding and messaging services. This left me unhappy. What if I want to use these services for something else?
Several unethical sales tricks.