I never shuck corn at the store, and it exasperates me to see people that do so because most of the time these people rip off half the husk and then toss the cob back because they have decided they don't want it after all. That's just dead loss for the grocery store, because nobody is going to buy a half-shucked messy corn of cob even though there's really nothing wrong with it.
I don't even peel back any of the husk to check it. When I pick up a cob, somehow I can tell by the weight, feel and smell if it's good or bad. I've been buying corn for three decades now and in all that time, I've rarely gotten a questionable cob. The only time, sad to say, that I've gotten a bad batch was when the farmer at the market insisted on selecting everyone's corn for him and didn't allow anyone to touch the corn. His prices were significantly lower so I got sucked in but it was truly lousy corn and I'll never allow anyone else to do my selecting again.
Coming from a farm background, I've always known the importance of freshness in corn. At my uncle's house, my aunt used to get the pot of water boiling, and then we'd race out to the field behind the barn and pick corn, husking it as we tore back to the house and got it into the water as quickly as possible. Oh, my Lord, there's nothing like it!
They didn't always have those "husk receptacles" at the grocery store. The stores were forced to put them there because people were leaving husks and silk all over the place, and it's a heck of a mess to clean up once many feet have trodden them into the floor. To my disgust, I still see boors husking and flinging the husks all over the corn display and just dropping them on the floor while standing right next to the can. Now, that's rude.