Do you check your email spam folder?

For the email service, I use Gmail and Yahoo! Mail. I almost never got any problem with them. Because they did great job filtering the email spams, I almost never checked my email spam folder. If they’re spams, why bother checking the spam folder?
But, I sometime check the spam/junk folder. Reading the email subjects in brief, just to see what emails are identified as spams. Recently, Mike Aquino was in a bad problem with Yahoo! Mail spam filtering feature. He got a job offer flagged as spam. This kind of case is rarely happened. But, this is a bad situation. Luckily, he did checked the spam folder.