Give him a break .. English is not his first language

Honestly though, the "rape" thing was pretty offputting to me. Completely gratuitous and not at all clever.

He may just be translating a common expression from his native language into English and doesn't realize how forceful it sounds. 'You've completely raped that function' is the literal translation of something I would say to someone that rewrote a function in a bad way. It would be considered to be less offensive than something that would translate as "you fucked it up". It's closer to 'you've completely wrecked that function'.

Assuming the .dk domain means he's Danish, I can tell you that there's no common Danish expression that would translate to "rape". We're not Vikings anymore.

More likely that choice of word comes from online first-person shooter games lingo like "Let's rape the opposing team's base".

Was "grammar" intentionally misspelled?

I would assume so. I have a wallpaper with "My Grammer is Gooder" on it. It seems to be one of those memes.

It's a rule - you have to typo when criticizing someone's grammar.

it wasn't... how funny is that!

Maybe I was translating from my native language.

Or maybe you just made an ass out of yourself..

perhaps. But I stand by the assertion that words like "rape" are best left to describing a horrific crime.