I hate it, and never use it.
I don't dislike it because it cheap or because it gives easy kills, I dislike it because the perk is over powered. If you look at Last Stand, you only get a chance to use it if you are wounded with enough force that would have normally killed you, just so long as it was not a head shot or with explosives. Why can't Martydom work in the same way?
I mean, how the hell are you going to pull out a grenade from a pocket with your last dying breaths, when you have just had you brains painted across a wall with a .50 cal shell or had your arms blown off by a claymore?
Another reason I hate Martydom is because I only play Hardcore, and it's just
stupid to use it on hardcore, but plenty of people still do
Unfortunately, I don't have the option of playing on a server it's banned on, because I play on the 360. Although I did read a few weeks back that IW are looking into adding 3 more playlists to COD4, Hardcore FFA, TDM without any perks and the other escapes me at the moment.