Actually, there might be legal issues with the flags. GDPR may in fact be being violated by showing a players nation against their will.In the case of TheNoob it's quite easy since neither Fizzer nor him reside in the EU.
Looking over Warzones privacy policy
https://www.warzone.com/PrivacyPolicy it is stated there: "Warzone will display the country you play from on your publicly-visible profile.". Apparently Fizzer got some legal counceling or put some thought into his privacy policy. However with the GDPR stuff always gets pretty complicated and I'm unsure what some of the abstract wordings there mean in practice. Displaying the country flag is data usage but the GDPR is also concerned with data gathering. Here Warzone can gather the IP data if there is a "legitimate interest" in doing so (whatever that means). Making the user having to accept the data gathering in order to use Warzone isn't going to work since there is a prohibition of coupling.
But then again I'm no lawyer but just some dude who has to get some small GDPR training once per year.