This is so nonsensical, I'm not even sure it's worth a reply, but I'll try one last time.

No one said anything about a conspiracy. No one said anything about a list. And of course it's always up to an individual to decide whether or not to tip. That statement has absolutely no connection with the fact (whether you choose to believe it or not) that certain jobs are specifically paid with the understanding that tips are a part of the wage. In most states, this is the case for waitstaff. Your waiter may be paid $3 an hour (or whatever), while the busboy makes minimum wage.

In other cases, tipping for certain services is a cultural norm. It's something I always research before I visit a country for the first time, and I can assure you that there ARE lists of who should be tipped. It's a much shorter list than the one you imagine of who shouldn't be tipped, and thus easier to maintain. Here's just one example from a quick Google search: http://www.whototip.net/ (I'm not vouching for it's correctness).

One can always choose to buck cultural norms. If you try to tip in certain European countries, or leave a large tip, they'll laugh at you. If you try to tip in Japan, there's a very good chance they'll give you your money back, and some may even be insulted. So that's up to you. My perspective is still that I'm not in favor of tipping for services that aren't traditionally tipped. If you think that, over time, engaging in that practice won't create a new expectation of tipping, you're not being realistic. Try giving your child a cookie every time he comes home from school...and guess what he'll expect and ask for when you stop doing it.

By the way, it's not like if I see someone tipping the grocery store clerk, I'm going to call them out on it. I just think expanding the tipping culture to more and more jobs/services moves us in the wrong direction.