Could you elaborate on how it went with your business? I'd like to learn more because I like some parts of Thailand, but I always heard differently. Here's the top google result, for instance:
"A foreigner can form or buy a Thai company, and even be the sole director of it, but Thai citizens must jointly own at least 51% of its shares – meaning a majority is technically under Thai control. Currently it is possible to allocate shares to several unrelated people, who could have no combined effect on the company's business, and this can be arranged by the lawyer, but along with most things connected with business in Thailand, there are considerable risks involved."
http://www.retire-asia.com/thaibiz.shtml
Actually, the whole article is generally very cautionary and negative against a foreigner owning a business in Thailand, which jives with what I've heard people who spend time there say.
Maybe it's only businesses with real estate ownership or leases that come under these terms? EX, no real estate, then don't worry about it? I think regardless, you'd be fine working from your laptop.
Anyways, I'm curious if you want to elaborate more. International business law is one of those things that every little bit you know becomes more helpful in understanding the broad picture of how markets work, imports/exports work, etc. It's something I try to pay attention to, research, and ask questions about when I'm visiting a place.