When I GM I feel it's fine to ignore unless you have a character that decided to dump stat STR. Then I pay very close attention to their "normal" load out.
At STR 1 you can carry 10 kg, or 22 lbs. (That's about 10 bags of sugar, if you are trying to imagine it.) I happen to know that a Colt M1911 fully loaded weighs ~3 lbs, of which a loaded magazine is ~ 1/2 lb, and use that as a guideline for Heavy Pistol weights.
I had a player turn up with a pistol Adept, STR 1, carrying 2x Predator V, 2x Lightfire 70, 2x Super Warhawk and 30 "clips" of ammo, so roughly 23 lbs there already. Added to this he wanted an Armoured Jacket, a backpack with 10 kg of explosive foam, and all the other miscellaneous stuff he thought a runner needed. Oh, and no means of transport and a Squatter lifestyle!
He was eventually persuaded to look again when the other players began impersonating such a character on a run. Imagine it, a pathetically weak elf stopping every few steps to adjust his gear, dragging the backpack of explosives, and begging the bus driver to drop him at the door and not the bus stop a block away!