IN/NOT IN Parsing

I'd never noticed until today that Oracle doesn't check if columns used in an in/not in clause are valid. Is this common knowledge that I've somehow missed out on?

Strikes me as being very dangerous as you could typo a column name & never know about it - at least not until your data was already screwed up.

create table t1 (id1 number);

create table t2 (id1 number, id2 number);

insert into t1 values(1);

insert into t2 values(1,1);
insert into t2 values(1,2);

commit;

select * from t2
where id2 in (select id2 from t1);

-- 
Preston