Another entitled begpacker coming to Thailand. There are way too many of your types coming here these days. Arrogant know it alls (who don't actually know anything) with an incredible sense of entitlement.
Enjoy the Banh Mi and bia Hoi, Thailand doesn't have anything like it. Other than at Paul, Tops and some foreign owned bakeries and major hotels, the bread here is dreadful and the beer is even worse. Thankfully Beer Lao is widely available in Thailand and imported beer from other countries is also sold in major supermarkets.
Yes they can. Any immigration authority can demand you prove you meet their requirements for entry. Argue it out with them, you'll be denied very quickly if you don't meet their entry criteria.
Wow, what a pompous, arrogant liar you are. I have my visa, which I obtained in Taiwan. You're just an entitled and arrogant person, I hope you are denied a boarding pass or entry to Thailand or another country. With your attitude, you don't deserve to come here.
Efficiency would be doing everything in the one place, whether that is at the embassy or online. I've never applied for a Thai visa online, so I can't say what it's like. I do know from reading reports in this group, Ho Chi Minh remains quick and efficient, even under the e-visa system.
I'm surprised Vientiane is so quick, but I wouldn't assume it will be like that for everyone.
Well, you can't do what you want. If an airline wants you to have an outbound ticket, you must follow their rules or you're not getting a boarding pass.
If you're lucky, they'll let you travel.
It's not about being allowed to purchase a one way ticket. You as the traveler are responsible for conforming with the rules of the country you're going to.
For Laos, like I said, the rules are a little vague. You might be lucky one time, then the next time an airline manager might insist you need an outbound ticket unless you can show them a visa in your passport.