I hate scented candles. Just saying.
Actually, I hate most scented things that have had synthetic (and even 'natural') scents added to them. I agree with the opinion that burning scented candles is probably bad for the environment. It's certainly bad for my environment—provokes breathing difficulties. People who are not aware of this problem need to be told that it matters.
Scented laundry products, soap, shampoo, etc, etc are all noisome.
I cannot have daffodils, hyacinths or lilies in the house and I simply don't understand why people need "room fragrances". What's wrong with fresh air? Open a window if there's a pong you don't like, or maybe find out what's causing the pong and eliminate it. Probably a good idea to do both.