Why would there be a showdown? Literally the ONLY people who will have issues coming in on a DTV (and then it's not really the DTV that is the issue) are those with past issues (but they'll probably still be let in) and arrivals from Cambodia, who may be extensively questioned and asked for proof of funds, made to fill out a form and so forth. May is the key word because it won't happen to everyone.
Miles? Sure it wasn't km, considering this is Thailand?
You won't need to show your passport throughout most of Thailand except near the Burmese border in Tak province (occasionally Kanchanaburi as well) and at the moment, near the Cambodian border.
Depends where you are and the reason why your passport is being requested. In most cases, you are correct. In some cases, you must be able to produce your passport, especially near the Burmese and Cambodian borders, if asked by the military.
Yep, especially near the Cambodian and Burmese borders, passports are definitely required. Normally, prior to the current conflict with Cambodia, you generally didn't get asked for your passport at checkpoints near the border but that has changed. Whereas near the Burmese border, it's been common for years but has become standard practice since early this year due to scam center crackdowns.
Anonymous participant 593 Nothing will happen until the day you go in for a new debit card, but if that's still years away (max length of time is 5 years) then who knows what the rules may be then but if it's within the next 6-12 months, I'd expect an account closure if you're on a DTV or visa exempt at that time.