I don't consider a flight suit "ridiculous" when flying. The reason they are so popular are they are extremely practical, keep your clothes clean, the zip pockets mean you still have your car keys on you to drive home from the airfield, and they give some protection in the event of fire. One of the aircraft I fly has the AVGAS tank between my knees.
I would much rather get my flight suit dirty when pre-flighting than ruin the clothes underneath.
However,
1. I don't have any badges on my suit, (or my car or anywhere else!)
2. I wear ordinary clothes when flying something civilised, like a Mooney
I think I paid less than fifteen pounds for my flight suit. I think it was money well spent.