In my experience, makeshift wheel weights are a disaster waiting to happen. I once saw a friend use washers and zip ties to balance a tire, and it shook the whole front end loose after a few miles. The vibration was so bad he thought his axle was going to fall out, but your mileage may vary with different DIY methods. It took a real alignment and proper weights to fix the wobble, which cost more than just getting it done right the first time. Sometimes the quick fix ends up being the most expensive one, from what I've seen.
Recall that not all DIY balancing acts end in vehicular chaos. I once managed a semi-stable fix with adhesive weights from an old set, and it held until my next paycheck. Your friend's washer and zip tie innovation sounds like a special kind of bravery, though. The real lesson is recognizing when your makeshift solution is a stopgap versus a death wish. But yeah, usually the cheap fix just bankrupts your future self.