No, I use the fader on a daily basis to list to music at levels anywhere from 95-110 dbs just in the car, all they do is bring every sound down something like 10-18 dbs. They aren't earplugs they are faders, they reduce the outside noise level evenly. With faders on you can just turn the volume up louder than without the faders on. After putting the faders in your ear you put the M-100, it really is not a hassle at all. You will not need the faders just on a daily basis, but for total isolation in very loud places you will need them. The M-100 is perfect for home and work use without the faders, and honestly EDM sounds fantastic with them.
I'm not a V-MODA sales representative so I could honestly care less whether you get the M-100 or not. That being said, it has been established that whether the isolation is good or not depends on many factors. Miceblue has stated many times that the M-100 is sufficient for low level listening in public areas. I can tell you from first hand experience that listening to music at what I consider a normal volume I hear nothing but the music and am almost completely isolated. Your assumption that the M-100 is probably good for isolating airplane noise while letting a bit in is true I would think. I have not used my pair on an airplane but from speaking with my girlfriend who used her pair of faders and her Crossfade LP on an airplane ride not too long ago, the fader LP combo offers total isolation where as just using the LP let in a little bit of outside noise. The Fader M-100 combo is not uncomfortable to me but it might be to you. If you were looking for total isolation either noise canceling headphones or IEMS would be the way to go.