Amazon warehouses in 17 states between the years 2013 and 2018, all relating to suicidal employees. The workers attributed their mental breakdowns to employer-imposed social isolation, aggressive surveillance, and the hurried and dangerous working conditions at these fulfillment centers. One former employee told The Daily Beast "It's this isolating colony of hell where people having breakdowns is a regular occurrence." On July 15, 2019, during the onset of Amazon's Prime Day sale event, Amazon employees working in the United States and Germany went on strike in protest of unfair wages and poor working conditions. In August 2019, the BBC reported on Amazon's Twitter ambassadors. Their constant support for and defense of Amazon and its practices have led many Twitter users to suspect that they are in fact bots, being used to dismiss the issues affecting Amazon workers. In March 2021, a flurry of new ambassador accounts claiming to be employees defended the company against a unionization drive, in some cases making the false claim that there was no way to opt-out of union dues. Amazon confirmed at least one was fake, and Twitter shut down several for violating its terms of use. In November 2019, NBC reported some contracted Amazon locations, against company policy, allowed people to make deliveries using other people's badges and passwords in order to circumvent employee background checks and avoid financial penalties or termination due to sub-standard performance. Amazon's performance quotas were criticized as unrealistic and as pressuring drivers to speed, run stop signs, carry overloaded vehicles, and urinate in bottles due to lack of time for bathroom stops; the company was generally able to avoid legal liability for resulting vehicle crashes by using independent contractors. In March 2020, during the coronavirus outbreak when the government instructed companies to restrict social contact, Amazon's UK staff was forced to work overtime to meet the demand spiked by the disease. A GMB spokesperson said the company had put "profit before safety". GMB has continued to raise concerns regarding "gruelling conditions, unrealistic productivity targets, surveillance, bogus self-employment and a refusal to recognise or engage with unions unless forced", calling for the UK government and safety regulators to take action to address these issues. In its 2020 statement to its US shareholders, Amazon stated that "we respect and support the Core Conventions of the International Labour Organization (ILO), the ILO Declaration on Fundamental Principles and Rights at Work, and the