I know Prussia doesn't exist anymore

[Froge]

But if an old Prussian baron invited you to stay for a few nights at his castle, would you accept?

Additional info:

Spoiler below!

The message sent is as follows:

"I'll make you grunt in pleasure. Brute-ally.

[Focalize]

Spoiler below!

YOU DON'T EXIST ANYMORE

[Alardem]

Spoiler below!

YOU DON'T EXIST ANYMORE

Your picture doesn't exist anymore OLOLOLOLOL

[WALP]

I would ask him why and decide based on his answers. If I do not get more information than provided by the OP then no.

[Mechavomit]

If he offers free food then I'm in

[Cuyir]

Nah.

Travel arrangements would be brutal for someone I don't personally know.

[Alardem]

If an English philanthropist offered you a luscious free dinner at his mansion, would you come?

[Cuyir]

If an English philanthropist offered you a luscious free dinner at his mansion, would you come?

That would be a more comfortable trip and i'd probably take it... hahaha.

[Alardem]

What if a beautiful French heiress offered to marry you?

Spoiler below!

Or if a long-lost relative suddenly sends you mysterious letters from Greenland?

[VaeVictis]

Nah.
Reminds me too much of Bram Stoker's Dracula, where Jonathan is also invited to 'stay'.