This is also where the majority of "PayPal sux!" type posts come from. People who get caught up in the hyper vigilant fraud detection stuff and get their account locked.
I have occasionally wondered how many of those foaming at the mouth tirades come from people who were actually scamming people and are angry that their take was locked away.
As someone who went through PayPal hell a few years ago, I'd say there is a lot they could do/have done to improve their customer service without impacting their fraud protection capability. I experienced issues like being bounced between different phone representatives offering different explanations for why my account was locked, a slow and duplicative process of uploading scans of identification documents, etc.. Just saying.
Also this quote from the book Zero to One: 'Max was able to boast, grandiously but truthfully, that he was "the Sherlock Holmes of the Internet Underground"'.
I have occasionally wondered how many of those foaming at the mouth tirades come from people who were actually scamming people and are angry that their take was locked away.