Technically not supposed to tamper with, splice wiring, etc. At one time you could get pigtails to repair wiring but not sure if that's still the case as collision repair standards have changed. Nobody ever thinks it's going to happen to them, but it's not only you that you have to worry about. it usually takes frame rail damage to set off bags, bumping a curb at low speed wouldn't do it. Most switches are inertia type switches so it takes a 30-40mph to zero event to trigger. If there are injuries and the bags don't go off it will looked at hard.
I was a Nissan tech in the late '90s, not too long after airbags became standard equipment. There's a lot to unpack.
First, airbags have safeties built into them. Typically the vehicle has to be moving more than 25 mph. The first generation airbags had a centrally mounted "arming" sensor, and there were three "trigger" sensors on the bumper. The arming sensor and one of the trigger sensors had to activate at the same time for the airbag to deploy. The trigger sensors were so reliable that the second generation of airbags went to a single trigger sensor that had to activate with the arming sensor. The third generation was when they introduced seat weight sensors and discretion for when to arm the passenger airbag.
Second, we absolutely did not perform any diagnosis nor repair on airbag systems. There was a replacement tree. If the airbag light was on you started at the top of the tree and replaced parts until the airbag light went off.
Third, the sensors only sense a rapid deceleration. They do not sense crunching metal. The arming sensor and trigger sensors back then were all specifically-weighted gold-plated balls held off of two gold-plated contacts by a calibrated spring. If a wreck was hard enough, the spring would compress and the gold ball would pass current between the two contacts. It drives me f'n bonkers when I see stupid Hollywood writers use airbags as a quick gimmick to avoid them having to write real scripts. I'm looking at you, Jack Reacher! Some dude walking up and kicking your bumper is not going to set off the airbag.
During the 1st generation of airbags, Ford got sued by a family who's kid was decapitated by an airbag. Utterly horrifying and gruesome, but it was mostly the family's fault. They were driving around, looking at Christmas lights. The kid was standing in the passenger front floorboard, leaning his head on his arms over the dash. They were doing over 25 mph and got in a wreck. The airbag was right under the kid's head. Ford wasn't in the wrong, but they paid that one to keep it quiet. If Ford deserved any blame, it was for not educating customers well enough on airbags.
Alternatively, one of the guys I served with bought a GMT800 Tahoe several years ago. He always drove extremely fast and never wore a seatbelt. He was driving on the highway and looked over his shoulder for a lane change. When he looked back forward the traffic had stopped, and he slammed into the back of a car with about a 60 mph speed difference. The airbag deployed and he walked away from the crash. Without the airbag he likely would have died.
I did see a car once where a customer threatened to sue because their airbag had "suddenly deployed while driving down the road at a constant speed". A Nissan engineer was on hand when the car showed up. The service writer, technician, and engineer asked the customer multiple times, and he held true to "I was driving down the road at a constant speed." They put the car on a rack, and as soon as they lifted it they could see the front crossmember was crunched.
"I was driving down the road at a constant speed, and then I slowed down for the railroad tracks..."
"Yeah, you can pound sand."
I would rather notch the snow plow mount around the airbag sensor than move the airbag sensor. I think having an on/off switch on the airbag is a good idea, just be sure and interrupt all possible power sources. I'm no engineer, but I wouldn't want the DERM (diagnostic energy reserve module - it keeps the airbag powered if the battery cable gets severed) to be powered up and ready through some stupid sensor.