Yeah that always worries me too but it hasn't happened yet. The hotter the oil, the more solubility of particles. But, if I feel that the tube is getting to hot, I let it suck up some air and then some more oil. Or just pull it out of the hot oil for a while. The best way not to melt the tube would be to ensure the speed of suction. Hot is the way to go. First I try to remove all the hot oil I can then I go and watch TNN on Sat. mornings for about 2 hours and come back in to suck up more oil. This is the procedure I use on all the cars that I have that I use Mobil1 synthetic. On a dino oil engine i.e. 300E, I just take a 15min break to clean up and then I come back to suck out more oil. The reason why I take a 2 hour break is because of the nature of synthetic oil. Their seek out and lubricate mechanism amounts to a good amount of oil still in the engine and not in the pan during an oil change. Just drop a little synthetic oil on a paper cloth and in about an hour, it will travel to the sides of the sheet. Some on this board, even let their cars sit overnight with no oil to drain it all out but I feel that the seals will become damaged this way.

2. No, a proper transmission fluid change would require dropping the pan.