Hagrid in Knockturn Alley

[dungrollin]

No: HPFGUIDX 111729

I suspect this has been done to death, so could a kind and friendly 
person point me to the appropriate posts?

When Hagrid was acting suspiciously in Knockturn alley he said Flesh-
eating slugs were ruining the school cabbages.

I can't even bring myself to spell it out, it's so obvious, (and you 
clever people must have seen it sooner than I,) but I didn't even 
notice it the first few times I read the book.

As a biologist I know that these things happen, creatures get given 
ridiculous common names that are based on ignorance of what they 
actually do for a living, (e.g. bird-eating spiders do no such 
thing) but still...

Dungrollin.

There was a young death eater spy,
Who's apparently terribly sly,
Though riddled with flaws,
He joined the good cause,
Let us pray JKR tells us why.
Amen