I found this rather amusing:

My XBOX is now Trash, Thanx to You! Stupid MCE-Sh[censored]t!

It flashed my ModChip (without asking me), now I can't use my XBOX anymore!

You have to pay for it!

I want 50 EUR transfered to my Bank-Account, so I can Buy a new Mod-Chip!

To quote the MCE manual: "Both parts of the installer will flash a BIOS to a modchip or TSOP without asking"

I'm getting more and more of these threatening emails and I'm letting you know that, from now on, they WILL be ignored.