If it is not already too late for litecoin services to avoid picking up that "bad habit" it might be a nice feature for litecoin not to have to worry about whether, and if so which, particular service you happen to use to send coins can or cannot handle coins being returned to the sending address.
After all it is not as if a lot of bitcoin services provide their source code, so litecoin services likely are going to have to code their own (and hopefully release the code so every other coin over the centuries doesn't also have to code their own) thus need not inherit such "bad habits" by virtue of "thats is how the reference free open source implementation of such services does it"...
-MarkM-