This is the important part of the condump:

[ZR] You have been infected! Go pass it on to as many other players as you can.
(ADMIN) Tasty Cakes | ibis.a: DO NOT EVER ZTELE AWAY FROM ZOMBIES
[SM Parachute] Welcome! This server is running SM Parachute.
[SM Parachute] Free parachute for everyone is enabled!
[hop] WCS MOD+ - cs_militia_nolag (0/21) [type !servers to join]
A Holy Hand Grenade has set you on fire for 14.8 seconds!
FANTOM killed ShRoOmMaStEr with zombie_claws_of_death.
(ADMIN) Tasty Cakes | ibis.a: banned player xF |:. VioByte|CoLdR|
You have been banned by Admin for 60 minutes
Disconnect: Banned (By Admin).
It clearly shows that he had just joined a team and was auto-infected - that SM Parachute message is displayed when you first join a team. If you actually bother to read and comprehend his original post, he never said he zteled, he said:

Apparently i used !ztele to get a way from a zombie but yet i turned into a zombie right after i picked a team.
which is clearly noting that the admin banned him for zteleing away from zombies, when in fact that is impossible.

So, this admin either accidentally hit his name when he banned (yet another reason not to use the menu), or is a complete dumbass. In either case more caution is needed. As for banning immediately for a first-time ztele offense, I would usually slay or kick first, or just do a 5 min ban at the most. Or maybe freeze them next round . I do understand that ZM is full of tards and it can get frustrating, but don't go overboard.

And Perry, you really need to stop acting all butthurt all the time. I like you, but take a breath and read his posts. He didn't demand an apology, and he didn't come off as a pompous ass at all - you read that into his post.