Agreed, zip lock ties work really well and are easy to fit/remove. I usually keep some in my tool kits for emergency repairs and also use them for all sorts of other jobs. My objections are purely on cosmetic grounds when used for securing cables and oil lines etc. Never thought of trying to hide them with rubber ties, maybe a bit bulky? I've not found the rubber ties I have bought at jumbles or on Ebay much use. I bought some good black painted alloy ties at Rufforth autojumble a while ago and they are very "period" looking. My local car spares shop keeps stainless ties, just the right size for bike use, I've bought some but not tried them yet.
The rubber ties I buy from Brit Bits are proper stretchy rubber. The ones usually for sale on ebay and jumbles are made of some stupid non stretch neoprene or something. Ron