It could be dangerous in that if you were in an accident the air bag may not deploy OR a sudden jolt from a pot hole could set it off.
You can get clock springs online but my advice is DO NOT buy a cheap Chineese one, they are of poor quality and shoddy workmanship.
Replacing them IS a DIY job as i did mine last year when i still had the Note.It is an easy and straightforward job. The hardest part is getting the correct clock spring for your car as i beleive there are three variants each with a slightly different diameter to the central boss. Whe you locate the correct part ( use the VIN number to check ) follow this video on you tube --https://www.youtube.com/watch?v=27RCT50dtO4