missing semicolon at end of psql files

I was surprised to find that psql -f file.sql with a file such as this

select 1;
select 2

executes both commands even though the second one is not terminated.

I realize that this is inconsistently handled throughout the system, for
example libpq APIs don't care about the missing semicolon, but
interactive psql does.

But what bothered me about this is that if a file gets truncated by
accident, there could be an unqualified DELETE or something similar at
the end.

Comments?