Retroactive prohibition of certain guns should not surprise anyone if it happens. The anti-gun crowd will start with requiring registration, saying that any good citizen should not mind merely registering guns, just like registering cars. Then increased fees and restrictions will be placed on the guns, such as a $500 annual fee, and the requirement that they be kept at the local police station, etc. and then when known owners fail to comply, the guns will be confiscated. I have no doubt that this might well happen. Most of my guns were bought in the last five years at licensed gun dealers in Illinois, and it would not surprise me to see a law passed requiring even old sales records be turned over to the Attorney General to create a registry of guns (all for our own good of course). IF worst comes to worst, the guns I bought many, many years ago in Texas when all you needed was cash and to show your drivers license (no information was recorded at the time of the sale), will still be possible to keep far from the prying eyes of the police state. If you want to really be scared, talk to friends, family and co-workers and see how many otherwise reasonable people support gun registration, confiscation of hand guns, prohibition of semi-automatic weapons (since they don't understand the difference between semi and fully automatic) and who would not be overly upset if the 2nd Amendment was repealed.