tl;dr, If the Kender survives session zero, then I'd be ok with it.
I ask all players to come to the Session Zero without any preconceived characters that they want to play. First listen to the setting (and also give feedback on it - it's two-way world-building), then figure out what you play.
If there are then good reasons to play a Kender, then we can talk. But everyone - not just the DM - should agree. I also want to hear from all players why their characters would team up with this Kender, and I want to hear from the Kender why (s)he would hang out with the others. If that all works out, then I am all for it. But that means that all other characters are up-to-date on the peculiarities of the Kender. It means that the Kender-player must explain up front how the characteristics of the Kender will be played. And that most likely means the chaotic-stupid character idea will get vetoed, but the what-could-possibly-go-wrong-adventurer may be embraced by the others.