You guys joke until the carrot rots inside and starts smelling and mealworms form and after they eat the carrot fully the mealworms starts falling on your lap.
I'm not sure if this is a repost from reddit but if you're actually interested. If you tell us the name and model, I can tell you which screw type it is using manuals. Sometimes it's a Allen, torz or a regular Philips screw.
Almost never. I have seen it used in classic cars before the Allen was invented but nothing since. The flathead screws had a high chance of slippage that might result in scratching the vehicle.
There are usually only a couple screws that hold in the horn button. They're usually located on the backside of the steering wheel and they usually go in toward the center from the outside.
Edit: yes, like the following comment says: airbags are extremely dangerous. They are literally explosives. If doing any work on the steering wheel i highly recommend disconnecting the battery.
I'd like to add that anyone messing around with anything in that area should be aware that the airbag is very much capable of taking your head off and throwing it into the back seat so make damn sure you know what you're doing.
Serious answer: not sure if all Honda airbags are the same, but check for 2 t30 bolts behind the wheel in the plastic cover. Remove those and it'll slide out enough to get the carrot. Disconnect the battery before you do anything though.
Most driver airbags are like that, some have holes you stick a tool in to release pins, but generally they are all made to be easily removable. There will be a YouTube video for your exact car if you search for it.