My spouse and I got married very quickly after meeting and yes the impact on one's life is real, but so is the upside and I find few online that talk about it. The upside is real. You see the extremes of humanity and it clarifies the importance of ethics in life.
That said, I think others should consider working in this field. The impact is real and I think many HNers would make good agents and officers. So I'm starting to talk about it online and I'm reworking my website and other things. Think of it as continued public service. We (Nato and friends) need good people doing this work.
One thing I should have mentioned is that I'm still working in this area, just not directly for the Canadian government any longer.
National occupation classification? Network operations centre?
Much less glamourous than James Bond, but I believe it's an.. interesting job.
It's possible in the short run, but you're leaking a lot of data doing it. My MO when I really didn't want to end up Googleable was to just give my real first name and leave it at that even if people pressed.
Edit: The reason is simple. If someone gives a false name and you know their real one then you're much more certain that they're trying to conceal their identity. So the downside is real, even if it is practical in some circumstances.