I don't particularly like the idea of electronic eavesdropping without prior judicial approval. I think that could easily be abused. However, things like extensive searches at airports and no-fly lists are fine, in my opinion. I don't think we have a civil right to be free of a search (any search is reasonable if it means that hundreds of lives will be saved as a direct result) or to not have our name flagged for a good reason. I realize there are mistakes to no-fly lists, but that's human error, which will always happen.