The tatics you outline would go a long way towards keeping out the illegals who only come here for the benefits, but they will not do anything to stop terrorist and drug runners from crossing over. A fence would go a long way in helping to stop terrorist and drug dealers from crossing, plus we need to enforce our existing laws on immigration to the max and stop our catch and release policies.
agreed..a fence would help, but for how long and how effectively? People can go around, under and through fences, unless we have guardsmen every 100 yards to watch it..my point is to take away the incentive for them to come here..
terrorists and drug runners will certainly try and come in with or without a fence..they'll come in boats, planes etc..