Are PCGS Genuine slabs identifiable in any way by serial ?

If you enter a damaged coin in the NGC registry using only its serial number, what happens ?Hopefully the problem coins are kept out automatically.If not, then what to do ? they could a) Disallow PCGS coins from the registry. Give a coupon to anyone who wants to stay, and crossover at a discounted rateI don't like this idea either, but just because I posted it doesn't mean you have to start insulting me..b) Allow NCS coins, and slash the points on both NCS and PCGS coins. This discourages using PCGS coins in the NGC registry.. they can just go to the PCGS registry anywayAny other ideas?No this is not an anti PCGS rant. Please do not fire off without reading first !