Has LDS active polygamy been "re-colonized" to places like Kolob Heights or planetary parts thereof and is this supposedly going on "right now?" Yes.
If an LDS member enters into a polyg marriage can he/she remain a member? No. Excommunicated.
If an LDS member enters into a polyg marriage at the very moment of death, does he/she get excommunicated or demoted some degree of glory in the life beyond? No. (If baptism for the dead can "up" a person a degree of glory, then certainly it should be a 2-way door)
Do the LDS marry multiple child brides? No.
Hey, if your grandkids were doing something illegal lifestyle-wise a few generations from now...and somebody asks them where they got the idea to do it, and they point a finger your way, don't you feel that you indirectly "aided & abetted" them in guiding them by word (D&C132:4,21) & deed? (exemplifying for them exactly what they might come to be arrested for)
So instead of fast-forwarding two generations down the pike, just hit the rewind button generation-wise in the other direction: Many LDS women were born as "child brides" in the 1880s...examples like Abel Hardy, who married a 15 yo (Maria Cooley) in 1896 and then post-manifesto, married Cynthia Porter (16) in 1901 along with hundreds of 14-16 yo LDS girls who were married off as plural wives in the 19th century and early 20th century.
Do the LDS kick out their teenage boys so they don’t provide competition for horny old guys? No.
No, I've already pointed out that this was a distinction even within 19th century Mormonism. Still, it wouldn't surprise me to hear of an LDS leader who may have sent a young adult "competitor" away on a mission to keep him from courting an available older teen or young woman.
Certainly we know one effect of the LDS heritage of polygamy--a lesson the fLDS learned well from their parents & grandparents--was what sociologist Kimball Young attested to re: late 19th century Mormonism: "under polygamy some men would have to remain unwed....it was not uncommon for a man to select a plural mate from among recent arrivals of converts in Salt Lake City" (Isn't One Wife Enough? 1954, p.124, as cited by Changing World..., p. 225).
Do LDS live in isolated compounds and rarely interact with the outside world? No.
No. But the insular lifestyle of 19th century mainstream Mormons is another lesson gleaned by fLDS from their LDS parents & grandparents...find a deserted place (like Brigham's Deseret, 1846)...John D. Lee's Ferry, which led to the development of Short Creek, where fLDS polygamy flourished...Oh, and according to Krakauer's book, Under the Banner of Heaven, who was the person the LDS Church sent to assist Lee & his wife living in that region? (The LDS Church) And what was his name? (Johnson) And was he the early fLDS leader? (Yes) And why, again, was even John D. Lee, one of Brigham Young's adopted sons, in that remote region, anyway? (He was "hiding out" from being too visible for easy prosecution for his part in the Mountain Meadows massacre...which means there's an indirect linkage of trying to cover up LDS initiated mass murder to a "trigger" for a "flash point" of fundamentalist polygamy.)
I don’t know if it’s Christlike love for our eternal welfare...
Indeed, it is. The same "prophets" that locked LDS into polygamy for over 100 years is the same "prophets" who locked fLDS into polygamy for the next 100. (All still cite the same LDS "Scripture"--D&C 132:4, 21, etc. And the same "prophets" that locked LDS into polygamy for over 100 years have been locking LDS out of the true celestial kingdom for the past 178 years.
Just as one 19th century LDS first wife who was so upset at her husband bringing home a second wife purposely shut herself out of her house by crawling on the roof that night--and freezing to death because it was winter--so, too, polygamy & other LDS afterlife beliefs have been wreaking spiritual havoc.
LOL! That's the funniest thing I've heard in a week.
Again, I humbly submit to you: you need a new hobby. Maybe knitting? Or crochet?