I had/have no problem with you questioning the claim, and I responded to your legitimate question respectfully. My issue was with the way you started your post, which seemed unnecessary and disrespectful to me. I responded in kind.
Too bad you've forgotten the Golden Rule then, and have started living by "an eye for an eye".
1. I'm not to blame for your presumptions.
No, but you ARE to blame for the language you use which causes those presumptions.
For example, in this case, if you had said, "Missionaries in Singapore operated under tourist visas because the other type of visas were hard to come by," I would have likely responded, "Oh, that seems a little odd, I didn't realize the church did that. Tell me more."
But what you ACTUALLY said was "most missionaries in Singapore were effectively there (in their capacity as missionaries) illegally." Very different word choice, with very different implications.
2. Singapore required missionaries to have the appropriate visa. Those were given to a select few missionaries. Everyone else was there officially as a tourist, and came into the country undercover. I fail to see the mischaracterization. The church decided to break the laws of Singapore because they thought (correctly) that they could get away with it.You can rationalize that however you like. I'd be very surprised if your dad doesn't know about this, unless those SE Asian countries weren't part of the Asia area (which seems highly unlikely).
I don't know what they'd be called, but presumably at the time they didn't exist because proselyting was illegal. We weren't knocking doors or preaching from street corners, but making contacts, teaching and baptizing is what we were instructed to do.
Was it actually illegal for people with tourist visas to make contacts, teach, and baptize? If not, then your earlier word choice seems highly questionable. I don't know about Singapore, but here in the US it's perfectly legal and 100% morally acceptable for someone to come with a tourist visa and do many many things that don't strictly involve tourism. Certain things are prohibited (work for pay I assume is one of them), but I doubt volunteer work such as helping a church for a few months would be one of them, as long as the individuals don't OVERSTAY their visa--which from your description it doesn't sound like the missionaries in Singapore ever did. But perhaps I'm mistaken and the situation is different there.
With one exception, all foreign missionaries were required to have an Indonesian companion to keep up appearances (i.e. better skirt the law). This was all made abundantly clear to me and my fellow foreign missionaries at the time.
This isn't just some ex-mormon axe to grind; I corrected people on this point repeatedly while I was still an active member, MTC teacher and BYU student.
edit: Any response for the missionaries who were sent to Indonesia between 1980/1981 and 2001 illegally? FWIW, I'm not sure of the details here, but Chad Emmett might be able to help. There actually was one Australian missionary in Indonesia in the early 90s (an Elder Tempany/Tympany/...not sure of the spelling). He had a hell of a time when things went south during the Asian crisis, and was forced to finish his mission elsewhere (where he wasn't in danger of getting killed in the streets).
No, I'm not familiar enough with that situation to comment. (All I know is what you wrote earlier.)