I don't ride with the real roadies (those focusing primarily on road riding, in this valley). There are some high level athletes here, and also a plethora of egos. I do ride with "real" mountain bikers, who sometimes ride road, gravel and cross. (EDIT: I am an alpine skier who mountain bikes a lot in the summer and does some bike commuting and road riding, and tries to keep up with the guys built like cyclists). For road riding, it is usually with the same guys I ride trails with, and they know me and don't care. Some of those guys have CO2, and some carry a pump. Our MTB rides are way out there, so most carry a pump there anyway, because if your CO2 doesn't seal right or inflate right, or lets all the gas loose not in the tube, you are stuck with a long, long walk. It has happened on our rides to guys without pumps (fortunately, one of the others of us generally do, so walk avoided). So, many are used to having a small pump when road bike riding, which we do early season some. Though some of those rides are gravel too. So, I show up with unshaved legs, my sidi dominators, (I refuse to spend a bunch of money on road only shoes), and no real kit. (Well, no road kit. Usually mountain bike clothes without race type logos, etc. Stuff like Club Ride type stuff.
https://www.clubrideapparel.com/ Just layers appropriate for the weather. I don't like matching road kits for myself. So, I guess I am sort of a fred. But more just a mountain biker on a road bike just until the trails open up. It's all good. I accept my mountain biker fred-ness concerning road.