I generally loosen and re-tighten crank arm bolts a few times per season. I have an inch-lb torque wrench of my own but it only reaches 200, so I borrow the one from work that goes to 600in-lbs I think. Cheap insurance...

I have no problem with square taper myself. They will continue to be out there in good numbers on less expensive bikes. Treat them proper and they will last as long as any other.