My back tires are worse than my front, and I still want to replace my ball joints and inner tie rod ends before replacing my front tires and getting an alignment. In so far as I know, my rear wheels alignment is fine, and there is nothing back there that I plan on replacing anytime soon. If I want to get new rear tires, while I get around to replacing all my front end stuff is there any donwside to doing that?

If it matters, the car in question is an Escort, so assume small FWD car.

The rear tires will not be affected by a front end alignment. However, being a small unibody vehicle, I would get a 4 wheel alignment in the near future.

I will once I get all my front end stuff done:

Inspect transaxle seals, and possibly replace.
Replace ball joints.
Replace inner tie rod ends.
Install camber bolt(s).
Replace front tires (replace rear tires too, unless previously done)

Then get an alignment.