I understand some people's concerns about discussing security. I, however, don't see it as quite the threat that some of y'all do.
For starters, we aren't discussing any particulars such as On Friday Jan XX, Flight XX from XXX will have X guards on board seated in XX, XX, XX, and XX. This is simply a general discussion about security on El Al. (The folks who are known worldwide to do it the right way.)
Also, all of the information discussed/revealed in this thread is clearly "public domain." If anyone were so inclined they could go to any public airport and see for themselves the habits of gate announcements, and positions of parked planes.
It would also be simple enough to fly El Al a few times to see what the questioning and security is like for yourself.
Anyone (including a terrorist) could do this. I would suppose that any terrorist worth his/her salt wouldn't try to "get a piece of El Al" in the first place, but if they were going to, they would obviously scout it all out first hand.
So I don't think this discussion is compromising the security of El Al in any way, shape or form.