remove the 'thrall' name tag from thralls

[mab]

thralls are very obvious: they are noisy, they bleed a lot and they look like zombies.

but most importantly, they have a name tag that makes them obvious when they talk and also via radio. so you immediately know there's a vampire if one of them talks via radio and that takes some of the mystery out of the round, especially on rp.

i think the 'thrall' name tag should be removed. any opinions on this?