Oh, so going to Syria to shoot people up isn't unethical? People are loving daft.
Take their passports, and their social welfare. We're not gonna pay for your loving trip to Syria and back, cunts.
Caribou is slightly mistaken in it being the idea of taking their passports away, as it goes further to take away their citizenship.
The 'unethical' side of it is that it is againt the Geneva Convention to take away an individuals nationality and leave them without a nationality.
Cameron (and other politicians) would have these British terrorists lose their British citizenship, and therefore not belong to any nation.
I agree with taking away their citizenship, and that the Geneva Convention is a load of stuff (which it is, as evidenced by the fact that stuffloads of countries (including 1st world countries) don't abide by it), but yeah, there should be care taken when removing citizenship to make sure it's the right decision.
That said, I can't come up with a defence for anyone who willingly travels to these locations, particularly if they go solely to meet and/or join with militants out there.
