For ride height, from what I've heard, nothing on your car can sit lower than the bead of the tire. If this is kind of unclear, there is a simple way of looking at it. If you take your tire off, or you get a flat, the rim must be the first thing to touch the ground. Let's say you are riding so low and you get a flat, your bumper hits the ground before your rim does, this is illegal. Not many people ride this low anyway, usually show cars or cars on airbags. It is virtually undrivable anyway.
So, to go really low, just get bigger rims and really low profile tires

Front window tints is the one that really bothers me. Many states and provinces allow some front window tint, why is it safe in those places but not here? I think I'm going to start a petition and get my MP to push for changing that law

Any work on your car done improperly (non-professional or inexperienced backyard mechanic) can be dangerous whether its a mod or just a repair/maintenance.
I agree that drivers, not the cars, are dangerous. How many of us have seen that "safe" driver going the speed limit that just drifts over into the next lane without shoulder checking?