it kinda goes without saying, i know we all would love to be the good guy that pulls people out of the ditch or whatever. but remember, if your truck breaks, or you break the other persons vehicle, whos going to pay for that? and if the insurance company catches wind of that, what are they gonna say? ive pulled over after watching people hit the ditch in winter. i always offer them a call with my cell to get them a tow truck. and they look at my jeep and ive been asked, but i always say the tow truck will do a way better job. i guess it depends on the situation.
my 2 cents.