Die in a fire = Ð³Ð¾Ñ€Ð¸ Ñ‚Ñ‹ Ð¾Ð³Ð½ÐµÐ¼. But I strongly recommend using "ÐžÑ‚ÑŠÐµÐ±Ð¸ÑÑŒ Ð³Ñ€ÐµÐ±Ð°Ð½Ð½Ñ‹Ð¹ ÑÐ¿Ð°Ð¼Ð¼ÐµÑ€".
Say him: Ð£Ð¼Ñ€Ð¸, ÑÑƒÐºÐ°! (Die, bitch!)
I don't know how to write it in Cyrillic, but I believe the colloquial equivalent is pronounced "yabay tvaya mach" ("go fuck your mother").
ÐÐ± Ñ‚Ð²Ð¾ÑŽ Ð¼Ð°Ñ‚ÑŒ ("yob tvoyu mat'").And the meaning is somewhat more vague, "fuck you mother".
I used to get periodic friend adds from the same two accounts over and over (they'd add me, remove me, then add me again after a couple weeks), and the only thing in their blogs was some get-rich-quick think in Cryllic and a picture of a guy drinking a coke. I finally messaged one, telling him I'd report him if he didn't stop.
Weird thing is, he seems to have stopped; I haven't gotten any noise from him in a few months.
Not quite the same thing as comment spam, of course, but an interesting observation about Cryllic spam on LJ.