Entering the adventurers' guild for the first time just wouldn't be the same if there wasn't a bully specialising in newbies present. But then again, it would also be exceedingly simple for an author to make fun of the trope.
Hmmm, is the adventurer's guild a place so lawless that there's a big guy about to slaughter a tiny one with a giant axe ? Then again, I don't believe he will even manage to do so but ...still...