Ruin Explorer
Legend
Do you ever have players complain about restrictions/changes based on theme?
Pretty much never, but I've always been open and honest as to why, and willing to at least listen to "Why you should include Race/Class X in your game". I may well still say "Nah", but I'll see what I can do for them, or help them to another choice.
As a player, I've seen DMs be real idiots with "No", to the point of banning stuff which is a significant default part of setting, and the banning of which served no real end, and went against player/setting expectations. One should never say no without a good reason, and always consider the possibility of a work-around - but in the end make the right decision for your group/campaign (not your ego!) which may still be no.
All that said, if I am persuaded to run DL and you wanna play a Kender, you better get ready to hear "NO!". That's Kenders though. They're a special case, because they're more or less precision-engineered to start fights and cause problems. They make having an obvious Drow in 2E-era FR party look like it's the least disruptive thing in the world.