I've raced numerous TC's and F1's over the years with carbon fiber chassis and have never glued the edges on a single one. I have also never cracked, delaminated, splintered, shredded, or torn an edge on a singe piece. I think its pointless, makes a mess, and adds weight. Quality composite work makes this pointless, but maybe the QC on the composites werent as good some years ago?
Oh yeah...I crash plenty too