I never said that someone who gets all OCD over the rims staying pristine weren't "real" pipe smokers. I have some that I keep pristine also, but the pipes that I actually enjoy the hell out of, I could care less whether there was anything on the rims. They are well-loved and look it.
Charring the rim, is one thing though. That is irreversible. Getting some soot on the rim from an over oxidized flame (metal workers will know what I mean), or getting some cake creep up on the rim is another... Char is from bad lighting technique, soot or cake creep is just the natural consequence of smoking.
Char is easily fixed by holding the lighter above the bowl. Creep and soot... I wouldn't worry about those. You can clean that up today like a frantic OCD piper off his meds, or years down the line whenever it crosses your mind again, but the pipe is not being damaged by it.