I have a few CF C&V bikes, they have not given me any sort of trouble, but I recognize that they require a bit more care, compared to a steel or aluminum bikes. Like storing them in the dryest conditions I can provide and never putting them away wet.
I also only buy CF C&V bikes in the best condition I can find. So it is prudent to be a bit concerned about getting a Carbitubo with some "scrapes" on it.
I think if the scrapes are not that deep (Only within a clearcoat layer.) and do not get into the weave of the CF material, then it could be safe to ride the bike.
You also have to look at the joints between the aluminum lugs and the CF tobes to see if sny of the tubes have signs of pulling out or the glue bond degrading from electrolytic corrosion of the lug.......