Nah, used according to instructions, nothing bad will happen. You spray a couple puffs into the air cleaner and they start right up. There are lots of brands & kinds; visit an auto parts place; they all have them. I use Sure Start, but just because it's there when I reach for the shelf.
Just don't get fancy & try things the instructions don't tell you to do: like filling the cylinder head wth the stuff. If a motor can run, it'll usually start and saves a lot of the back!