What stirs your rage, /prog/?

Mine are people who do this on C-like languages:
if(numbers==NULL)
{
numbers=temp;
numbers->next=NULL;
}
else
{
temp2=numbers;
while(temp2!=NULL)
{
var=temp2;
temp2=temp2->next;
}
temp2=temp;
var->next=temp2;
temp2->next=NULL;
}

No spaces between operators.
Opening brace on lines by themselve.
Else statement not a continuation of the if-statement it belongs to
Terse variable.
camelCase

People who use if/else blocks instead of early returns.

i.e. instead of writing all your fucking code in the else block like this:

if (foo) {
x += 1;
} else if (bar) {
x += 3;
} else {
/* huge pile of shit */
}

Write it like this

if (foo) {
x += 1;
return;
} else if (bar) {
x += 3;
return;
}

/* huge pile of shit */

Now the trivial cases are dealt with early, the main body of the function isn't indented at all, and your coworkers are less pissed off at you. Everybody wins.