Not to get political but this goes back to 9/11. As part of efforts to prevent terrorists to launder money to sleeper cells, the AML regulation was created. It was amended in 2008 (I think) to cover anyone using financial institutions to launder funds from illegal activities. Not sure why pornstars are being targeted by the bank in question but it has decided to target pornstars under their AML program but it suggests that they have done their risk assessment and decided to include pornstars. Risk assessments are subjective and will differ from institutions. One bank may think it creates reputational risk for them to have a pornstar as a client while another would think it doesn't.  

Remember its people like me that run these programs. My bank does not think its risky to do business with pornstars.