As Ajahn Jayasaro said: the Vinaya and even the most minor rules are like concentric rings of an inner fortification. If you keep the minor rules strict the most major rules would be kept easier if even tested.
Some things shouldn't become public too. In german we call it "Bärendienst" when one causes damage to something. He is honest and that in itself is great, but has he been asked to spread it to the WWW? Discuss it with fellow Bhikkus, very close Layfriends or Familymembers. For some people who are not as understanding or coming from a more informed background this testimony is another proof that something is really wrong with celibate monks (or nuns). That he violated the trust of the boyfriend by watching porn and being thrown out of the shelter is a saddening event. This man surely will most probably never ever again trust a buddhist monk.
The damage done to the buddhasasana can't be evaluated. But even the slightest scratch that a celibate monk causes especially when public attention is given is a desaster.
Although, as I say, I feel no real remorse, I am concerned that my behavior, and my subsequent writing about it, may harm the reputation of the Bhikkhu Sangha, an institution to which I am very much indebted. If so, I sincerely apologize for that.
Indebted indeed. If ... then he apologizes. Why not do all this in the first place or at least keep it for himself, learn skillfully out of this for ones own benefit in practicing a celibate renunciate lifestyle? No he writes publicly about it - why does he needs to? what drives him to make it public? - and risks all the possible outcome out of it. If he would really feel indebted and would be really concerned about the reputation he wouldn't have done it in the first place.
In some places ordaining is as easy as disrobing. Monk in a day. So if any monk feels the urge to engage in some tantric adventures like he did he should follow the advice of that canadian monk: disrobe, do what you think you need to do and if you've gained that oh so valuable experience ordain again - or become a good respectable lay person. Every monk who disrobes deserves respect since he honestly noticed he can't live that life. This I call being truly honest.
I don't think Theravada Buddhism needs millions of monks. A few good ones are good enough.
This story makes me feel even moreso confident that the practice for example of the western Ajahn Chah Sangha of the threefold training (Anagarika - Samanera - Bhikkhu) is best for many. Check out the lifestyle, the rules, bit by bit until you can make a decision based on experience.
I'm sorry if I have offended anyone here.