As far as I know, Flash has never forced somebody to explode from vibrating. Its pretty safe to assume that he never will, because Flash usually does not kill his enemies.
Right before Wally West was introduced to the speed force and acquired new abilities, the Wizard magazine displayed a interview they had with the current Flash writer at the time(I believe it was Mark Waid). Waid said that this Flash would have abilities that no Flash has ever had. For example, the ability to vibrate through any material he wanted, forcing explosion. I can't remember if vibrating through people was mentioned, but Wizard may have used that interview to bring out their assumption that Flash can perform that feat.
The magazine is several years old and, as usual, I have no idea where it is. I will try to find it and try to find the magazine that has the complete sloppy seconds list. As soon as I find the magazine with the Flash article, I will look to see if they specifically mention Flash being able to vibrate through actual people and shed some light on the subject.
If Nigel is correct about Barry vibrating through somebody, then Wally definitely can do it. The fact that Wally has never forced anybody to explode does not discredit the theory that it is possible for him in the slightest. Everybody knows Wally "would" not do that. I am pretty sure Superman can kill a regular person with one punch, but we will never see that either.
Anyway, I typed all that and got absolutely nowhere. I will do my best to find that magazine and see if the ability to vibrate through people is mentioned.
One of my beefs with the list is their "reason" Flash defeats the Hulk.
"The Flash would just vibrate through the Hulk and , ewww, make him explode."
Flash has been unable to vibrate through dense matter in the past. Hulks flesh is comparable in density to adamantium, and though it lacks the metal's tenacity, it is virtually impregnable. I seriously doubt Flash could vibrate through Hulk, much less cause him to explode. That's some of the poorest reasoning I've seen coming from Wizard.
That was when Surfer was not intent on defeating Carnage. In other words, it is not a good example of what would happen in a fair fight.
Did you see what happened at the end of that story? The symbiote rejoins with Kasady and threatens Surfer. Surfer states that he pities Carnage, casually raises his hand, and turns the symbiote into an energy shell that encases Kasady.
Carnage is a Spiderman villain. In other words, he has no business trying to fight someone as powerful as the Silver Surfer.