I have posted this in another thread but fits well here too!
Quote:
The moment a buck sheds their velvet they are “ready” as their testosterone reaches the level and their velvet sheds. However, they know the does are not quite yet due to some “scent” missing in the air. With every passing day their testosterone continues to rise, they become more territorial and less tolerant of other bucks. With this cooler weather pattern we have been seeing it puts the bucks eagerness and readiness on the EDGE of breaking and it only takes one doe to become a lil ripe and it puts those bucks into OVERDRIVE. Those Mature Bucks know exactly what does come into estrous first. My second buck I ever harvested was taken on a similar type weather pattern as we are experiencing now. I shot him in early to mid October and his neck was full blown rut and he spent the entire morning chasing does and driving out any other buck in his area. This is what got him in trouble as I had a few forks below me and I grunted at him form 75 yards and without thinking twice he came to whoop some
on a string before he made it 22 yards from my tree until a Easton Super Slam XX78 went through him. 
I along with a few of my hunting buddies have been seeing a pattern for the past X years and have hypothesized a few things and every year I see more sign this is true. A few other people have posted about scents, calling, rattling, or decoying. I said I was not a big fan in the early season but come the first week of October it was a different story.
So bucks chasing or fighting in late September or early October maybe a lil different out of the norm perhaps, but far from unheard of or unseen. Just my $.02. 
To answer your question, no your buddy is not nuts IMO. However with that being said, it is no where even close to the peak of the rut right now. But using scents, calls, or decoys right now can pay big dividends and has worked many times during this time of the year! 