Hatyaiwittayalai school in Songkhla closed its gates on Monday and Tuesday and moved lessons online after a sacked South African English teacher posted a firearm threat in a 5,000-member LINE group. Police have a complaint on file, the man left Thailand on July 19 and is reportedly blacklisted. For most SME owners this is a local security story with no direct business impact, but it is a reminder to review staff dismissal procedures and to keep your own group chats and staff communications under control.