Motorcycle crashing is never a good thing and if you've ever done it I hope you were able to learn a little something from it.
That being said, I've crashed lots of times.

Not sure I've learned anything but every time I've crashed I've been as sober as Judge Judy.
I'd hate to see anyone get on a bike or in a car while they are shit faced, but a beer or two or maybe three seems to be something any grown man should be able to handle. If you can't maybe it's time to hang out with the ladys.
I like to have a beer or two and go for a ride. I just enjoy it and have lots of practice at it. I also shoot in a small bore league on friday nights .22 cal. Before I or we hit the range some of us like to have what we like to call Group Titen'ers. That's a beer or two. I can say for sure that my score will be 10-15 points higher after a beer or two. On dart night I play like crap untill I get a few in me.

I really hit my sweet spot after 5 beers, but any more than 6 and it's all down hill. I've never been able to figure out the hard stuff so I stay away from it if I have any thoughts about riding or driving. I only indulge in the hard stuff when I'm sitting here reading the things you fine people write about.
For me the drinking thing has never been black or white. Kind of a gray area. Some can do it and some should'nt