They might also try to kill you themselves. Honestly I think most murderers (or would-be-murderers, or people who [try to] hire murders) are probably not thin

They might also try to kill you themselves. Honestly I think most murderers (or would-be-murderers, or people who [try to] hire murders) are probably not thinking about their situation rationally. Phrased another way: most murders are not rationally motivated. Therefore I don't think the 'rational analysis' approach to predicting who might try to have you dead is likely to work well. There are exceptions to everything but I think in general the more erratically somebody behaves, the more you should be concerned.