How can you say this? Did this deter the b@st@rds the committed Tuesday's atrocity? Of course not. They couldn't care less about "eluding authorities" They planned on suicide along with mass murder.
For that matter it doesn't deter a lot of ordinary street crime. Most criminals have a long record. This implies that they have failed to elude authorities repeatedly. This never seems to do much in the way of deterence.
Geez, did either of you read my second sentence? I stand by my claim that most terrorists do not want to perish. Since they know escape is impossible, they are deterred from hijacking planes. This group was NOT afraid of death, so they were unaffected. See my first post for my theory on deterring them. Incidentally, it's pretty much what you suggested.