It's called pyramid quoting. Its very common for newbies. Even me, lol. I used to but I don't now. I don't see this much in the global section. But you'll find it widely on local sections. If you wanna reply cleanly to multiple person you should follow a basic rule. For example, I'll show below.
According to the OP post, he already knew it was a pyramid post, which is prohibited in the forum, and you are posting like he doesn't know what a pyramid quote is and we should avoid it. And we really don't have to see this in global sections because the rules are strictly obeyed there, and consistently making pyramid quotations can cause trouble.
Still, I'm sure it's not frequent in nature, rarely in a week or month you'll face it.
It does not matter if this case is rare or not; the forum has prohibited the use of PayPal quotes, so it is better for everyone to avoid unnecessary quotations. I also used to do this, but from the time I learned about it, I tried not to do it. If I have to, I prefer to write names, but in most cases, I don't have to, and that's where I agree with you because if I have to use it rarely, then you are 100 percent sure that it's not frequent, and it's been proven.
Other than Pyramid quoting, unnecessary calling is also annoying. For example, if a person makes a post and calls your name in it, and another person tries to reply to that post, including your username, it will give you a notification of a quotation while the person replying to that quote is not talking to you.