I'm not sure how anyone would consider a person willing to step up "FOR A PERSON THAT DOESN'T KNOW HOW TO CHANGE A TUBE" as a Sheldon Brown reincarnated who wants to jump in and provide unsolicited assistance.Sorry. Not how I roll. I'm not going to make a guy struggle, get embarrassed and frustrated while he prolongs a delay, to keep from getting my hands dirty. My point (again) was to suggest to those who seek/welcome help on bike repair/maintenance/tube swaps to do what they can to make that task easier on their helpers - such as keeping the bike clean.
Pretty simple concept. Not too controversial.
I've helped plenty of clueless mechanical dorks while performing roadside repairs. Many unknown people I've seen stuck on the side of the road. Flats, broken spokes, severly out of true wheels, rear derailleurs and none have ever complained that I helped them get home.