But you should make it common practice to NOT used IDs that start with numbers. Do that and the need for quotes is moot and nothing has changed about how scripts work. Overall nothing is lost and only stability and ease of understanding is gained.
I was talking about form IDs, the hex numbers the GECK assigns, rather than editor IDs, the ID you assign yourself. Some of the things placed by the developers into the game world were given ref names that you can use to refer to them in scripts, but a lot of them are unnamed, so you have to refer to them via the form ID (or give the ref a name, but that could potentially conflict with another mod.) But yeah, that is good advice.