Mae Sot has reopened. You can get your visa in Chiangmai at PP Travel on Thapae Rd for 1000 baht then go up or get them to EMS your passport to you. Make sure you have 2 photos. Please note there is a fine imposed after midnight if you do not have your passport on you or a copy of your passport on your person equivalent to 200 baht or more. But it now takes 48 hours to process your non immigrant visas not 3 days as before.
Nothing is free in Burma.
If you think that you are blacklisted, I would suggest not crossing the border. They mean business. Otherwise, if you are just a friendly tourist they welcome you with open arms. Things not to talk about in public or with anyone, is politics, rebels, drugs, or Aung San Suyi. Some never learn.