If you personally don't care for that reason, and don't think it's a good enough reason to justify giving the server owner your mobile phone number so you can register your account, then that's fine. Simply do not play on that server, but you're a straight up liar if you say no one sees that reason as a good one, or a justifiable one. Many people enjoy and benefit from this.
You're also paranoid if you believe doing so will endanger your life.
I agree you could potentially get "harassed" or "spammed by marketing" or whatever, but that's a very very unlikely scenario that is easily dealt with by blocking a number or two, and being fearful of that happening is almost equally as paranoid as believing it will lead to endangering your life.
I read the other thread now - I didn't know there was another discussion about this topic.
The description of the system itself sounds like a creative solution for multi clienting, but not without issues.
At the moment I have 3 different phones (due to my work), so the solution alone would not work with me - which means the Server is still depending on reporting/manual watching from other players or mods.
I won't say that I like the solution but i can see the added-value of the server.
I also understand the heated discussions here now a bit better - people already flamed themselves on the other thread.
Unfortunately i don't think you're getting through their thick skulls, the reason this thread got started and the reason my review was flamed is because a few people are trying to keep other from playing Ragnarok Travels. What other reason do they have to make something like this? I do not genuinely believe for one pico-second that anyone is honestly trying to be the "savior" of the RO community and save everyone from leaking personal info and doing so out of the kindness of their heart. This post, the post i shot down on reddit and the backlash i received on my review is just a giant smear campaign against Ragnarok Travels by a few people who think servers are like political parties to get behind... No matter what good evidence you provide to contest their arguments, someone from the campaign will pull another stupid outlandish reason out of their donkey to keep this thread going.
Like the admin who locked my review thread said "User who value their privacy may choose what information they share with any online services they sign up for. Let's just leave it at that."
It's funny, because i didn't even know ragnarok travels before this discussion.
What other reason would I have to tell people to be careful about private data? There are many.
I'm someone who was trained to exercise the GDPR while at work, so i may be a bit more sensible about this topic.
This may also be the reason that I can see why Data Privacy is such a huge topic - and many people that doesn't live in a democratic country with free-speech and human rights knows the actual worth of this.
You talk about "political parties", about an agenda.
Inversion of the argument: your first post with your account was a review how your server is the best one, and how good it is - isn't that exactly that? Just an agenda to push the server you're playing on? Why else create an account here?
I don't even care about it - I started here on this forum too like that years ago. It's fine, it's legitim, but it's also legitim to critize a server for things it does.
But even if there are "political parties" against you, to use that as that an automatic disqualification for every argument that goes against your own agenda seems cheap to me.
Neverthless - the admin himself should already know that he won't reach everyone with his server. If it's acceptable for him, that's fine then? A good Ro server chooses it's own niche, it doesn't need to reach all.
PS: I looked up the TravelRo site now - When i click on "Register", there is nothing to put in your mobile phone number, also the Terms of Service aren't mentioning phone numbers at all (?) when do you even put in your phone number?