QR vs solid axle for freewheel hub I've heard a lot of folks complaining about freewheel hubs getting bent axles.

I have a rigid BSO with a solid rear axle that I occasionally pound on local trails. 

I've never gotten a bent axle. That said, I only weigh 145 so maybe that's not saying much.

Anyhow, I have a friend who doesn't weigh much more than me (maybe 160) who has gotten TWO bent axles. He never rides off-road, and his bike is nicer than mine.

He has a QR rear axle.

Is this a legitimate reason to avoid QR's on freewheel hubs? Has anyone bent a solid axle?
This is not a 'legitimate' reason to avoid quick releases. 

Just like anything in life, there are low and high quality offerings, and there is good and bad luck. Your friend either has a low quality wheel or bad luck. The bar for quality on a BSO is pretty low, so even if his is nicer than yours, it might still not be high quality.

All my wheels besides the coaster-braked wheels have QR axles. I weigh 200 pounds, beat up my bikes and I've never had one bend.  

This collection of bikes includes a tandem. It has QR wheels. If anything is going to put a QR axle to a test of strength, the tandem is going to be it. And it is fine. Many vendors of tandems equip their bikes with QR wheels. They're all fine.