The lasers at techlasers are not fakes, I've taken extensive time to do some research into it. In some cases they are cheaper, though I don't know if this is the case with every model.
Most of the time lasers do get past customs, some places list a value of 0-5 dollars and call the laser a "penlight" or "flashlight." Without a variance on your end, there's technically the potential for an issue no matter what measures are taken. 99.9% of the time nothing happens and everything goes throgh without an issue, no matter what company you order from.
As long as there is some clause where in the case of a customs issue the company will send you out another or give your money back, there's no harm in ordering. At some point you can be sure that laws will tighten though with all thelaser incidents being reported, but in the meantime enjoy the freedom to order these for your hobby.