Deterrent, schmeterrent.
Reb AT, are you in control of yourself when it comes to lust, or not? (I'm not, even though I'm sober)
How long can other people watching or the spectre of chilul Hashem really be expected to work to stop you?
Are you actually planning on 'beating' this problem mainly through ceaseless vigilance?
And finally: Does your heart tell you that the only real problem you have is environmental: the internet, pretty women, this stupid culture we live in, etc.?
My heart told me that even though my environment was certainly a challenge, I had a problem of some sort. It just didn't seem normal to have one's mind taken up by struggle with lust so often and so much of the time. If I "fixed" it here, it came out over there - if I stopped turning to lust when I was depressed, I found myself turning to it when I was happy! ??? Also, just getting out of the habit didn't stop me from being preoccupied and eventually succumbing later on. I was always counting the days I resisted it - as if reaching a mark of a month, year, or whatever, would mean something, much like a bar mitzvah of sorts..."Phew, I made it!"
Obviously, many people don't have this history and find success (however they define it) where I did not. I truly wish that success for you. But you posted your frustration above, so I am sharing with you that for me: Lo zu haderech.
For me, the Problem is as much a part of me my liver is, or as 'Fear' is - and it plays for keeps. All the external controls will not save my behind. The problem of my mental/emotional programming to use lust and human sexuality for purposes that it is not intended will not go away just because I don't act on it. Hashem clearly didn't give sexuality to us to run to for courage or comfort when we feel scared, lonely, or too emotional. Its tremendous power was not meant just for creating that 'trance' many of us experience while searching for schmutz in order to forget our stresses. All the stresses of life have their own real and healthy solutions...none of them require lust to work. Sexuality and the relationship that it is part of is clearly meant to raise a relationship to a deeper level. More connection and fewer separations - not more secrecy and lying!! That is always what lust led to for me, before marriage and in marriage. I always had it totally backwards! I perverted what Hashem gave me to use and enjoy, into a drug.
You can't really enjoy something that you require. Freedom is the gateway to pleasure. Addiction eventually ruins our enjoyment of whatever we are addicted to, actually. Then it slowly ruins everything else, too.
So this Pesach, I hope to be thinking about chayrus as the gateway to pleasure, bechirah, relationships, self-fulfillment, sobriety, avodah - Everything! Total Chayrus is the prerequisite of a melech. He's no melech at all if he's not totally free! No one stops him. He is even poreitz geder! No wonder sforim say that our entire avodah on Pesach is about Malchus, which is bechirah.
And in my own case, the one time I feel I have the least power of bechirah (freedom) of all, is when I am acting out on Lust, r"l. Thank-G-d I am sober today!