ATTN 343i: Why is "Halo" and "Hal0" not allowed

Games Halo 5: Guardians
1

as service tags? It was allowed in previous Halo games. :confused:

2

That’s weird, they should be because I’m pretty sure neither of those are vulgar…

3

Halo 3 had a few not allowed ones,
I17
Ps3
And a bunch others that got patched in.

4

maybe they are afraid of people impersonating 343i employees?
even still, it was allowed in Halo 4… :confused: