A few misc questions..

So While playing I've noticed a few things about the game and would like to know if you guys had any .. answers:

1. Do dwellers with high intelligence have an easier time of dealing with "room disasters" caused by rushing? I noticed that in my medbay that if there's a fire its almost always really small compared to how big fires get in other rooms. They also seem to deal with this fire super quickly and take barely no damage (maybe like 1 or 2 hitpoints each) They also seem to wipe out radroach infestations quickly too and this is them with guns that do like 3-4 damage. While I have a three room diner with everyone with 3-4 damage guns and they almost get half their health wiped by the time their 6 man crew has wiped like three radroaches.

2. Do some dwellers just randomly .. "wander" ? I dont know if this is an issue with my touch screen or not. but at one point I had a disaster in my radio room, they dealt with it, but when I looked back later i noticed the two dwellers in that room were wandering the vault for whatever reason. They were like "fuck this shit i'm done" and I had to place them back in there.

3. Does "Strength" effect unarmed damage? if I had a bunch of level 10 strength dwellers in a power room, would they do more damage with their fists than an average dweller with like 1 - 3 strength or does the damage for fists stay the same regardless?