There is no harm, any attire (even military fatigues) can be used for civilian clothing provided individuals wearing them are not armed. Our laws are against it but we did not cast the laws in stone. Wearing anything that matches our forces’ uniform is in fact an expression of patriotism.
We must recall that thousands dreamed to serve in the forces but failed to get a slot and the only solace they have is in donning a military-like fatigues. Citizens should be allowed to freely wear the fatigues with no harassment or intimidation from any quarters provided they are not breaking any law. However, I would not support criminals and gangs that use the attires to indulge in unlawful acts or to intimidate the public.