I kill Zombies all day long with cool traps without any XP ^^ just for the fun of watching a bloody mess... btw I miss the flamethrower turret...
Some seem to say it was never there. I do remember it was around at least in creative in b197 and maybe b199. Best I can tell this is the xml code for it.
<block name="flamethrowerTrap">
<property name="Extends" value="dartTrap"/>
<property name="CreativeMode" value="None"/>
<property name="Class" value="Launcher"/>
<property name="DisplayType" value="blockElectricalHardenedMulti" />
<property name="Material" value="Mmetal_hard"/>
<property name="Shape" value="ModelEntity"/>
<property name="Mesh" value="models"/>
<property name="Path" value="solid"/>
<property name="Model" value="Entities/Electrical/flameThrowerTrapPrefab"/>
<property name="MultiBlockDim" value="1,2,2"/>
<property name="OnlySimpleRotations" value="true"/>
<property name="PlaySound" value="darttrap_fire"/>
<!-- <property name="StartSound" value="darttrap_start"/> -->
<property name="EndSound" value="darttrap_end"/>
<property name="BurstFireRate" value="0.3"/>
<property name="ShowTargeting" value="false"/>
<property name="Collide" value="sight,movement,melee,bullet,arrow,rocket"/>
<property name="AmmoItem" value="ammoGasCan"/>
<property name="RequiredPower" value="10"/>
<property name="Stacknumber" value="10"/>
<property name="TakeDelay" value="10"/>
<property name="EconomicValue" value="220"/>
<property name="FilterTags" value="fdecor,felectrical,ftraps"/>
<property name="SortOrder1" value="70a0"/>
</block>
At some point it was clearly changed to not show up(<property name="CreativeMode" value="None"/>

, and there is not a recipe for it in recipe.xml that i can find, so it cant be crafted. I never used it to see if it worked, but I did place one in the world. Took up a bit too much room for me to feel it was very practical with my base design though.
Just confirming you aren't crazy Mr. Duck