In the end, you have 2 choices:
1. try to control other people
2. control yourself
There is literally no other options. Theres no "middle ground." Any advice/comments/etc boil down to ONE of these two choices.
The entire first choice is moot, because given 10 million years, you will never be able to control other people's behavior. No amount of good advice, helpful HN comments, 1000 word blog posts, will never, ever, 100% remove all threads of possibility of getting teased/whatever. I would not categorize this choice as "wrong" (which implies bad), but merely "moot" (neutral).
Therefore, that only leaves option 2. Discussing anything to do with what people "should" do is, quite literally, a waste of time. This idea CAN coexist simultaneously with the idea that I treat people well. Why? Because being nice is option #2... its something I control about myself. I CAN control how I treat other people, just as I can control my reaction to other people.
I don't condone/not condone the person email, because I don't even look at things like that. I look at things in terms of what I'm capable of controlling (or, that is the goal, anyway. sometimes life can be tricky!).
If i were to look at things in terms of what other people "should" be doing, then I am destined for a lifetime of disappointment and emotional turmoil.
There is no other way.