I wouldn't mind if we closed the detention center at Gitmo, provided we put in place sensible rules for dealing with the enemies we capture.
We should start by calling the WOT what it is: a war. (Most accurate title I've heard so far, is "The war by terrorists against us".) Then we should declare those people Prisoners of War, and treat them accordingly, as described by the Geneva Convention. This would include:
1.) Keeping them prisoner until hostilities cease. As lont as their friends keep declaring they are at war with us, and they keep attacking our troops or our civilians, hostilities have not ceased.
2.) No torture (we already follow this rule perfectly). Interrogations, including long ones, are OK.
3.) People found engaging in hostile acts against us, without uniforms, will be summarily executed in the field as spies.
4.) People without uniforms found engaging in hostile acts against civilians of either side, will be summarily executed in the field.
5.) People WITH uniforms found engaging in hostile acts against civilians of either side, will be duly tried and punished appropriately.
...plus more as called out in the Geneva Convention.
I'd suggest to the people who oppose us, that they declare allegiance to one or more countries, enlist in that country's armed forces, and put on a uniform. If they don't, points 3 and 4 above, apply.
If the terrorists start wishing they could go back to Gitmo instead, tough luck. They had that chance, and they (and their supporters) blew it.