Wrong.If he has a Visa they don't do anything.They will ask for a Visa and that's it.Only If He want's to travel on visaexemption they want to see a ticket out of Thailand in between the 60 days.
But many accounts of normal foreign customers became freezed.So every one is in danger.This can Happen to everyone without warning. I closed my account immediatly.It will cost Bangkok Bank 1000nds of customers.
Go to the Policenstation and report your money is stolen by Bangkok Bank.Would be interesting to see what happens.Everyone whos account is freezed should do so.The bank works with that money.