They should not cause attacks. Lots of us use colored bands to identify our chickens. I've never seen any peck at mine. That's just not an issue with mine. I have pink and orange but I don't have red.
The danger is that they grow really fast. That band can get tight and cut off circulation to the foot. You have to really watch them and remove them and replace them with larger rings. Some people use small colored zip ties for that since they have to be replaced so often.
Some hatcheries use food dye to mark chicks when they ship if the buyer requests it. The problem with that is that they shed down and grow feathers, then shed feathers pretty often. Again, you have to really stay on top of it to keep the coloring there but at least there is no danger of them getting a foot cut off due to lost circulation.
Some people paint the toenails with toenail polish. I don't know how long that lasts. I would not use red since red seems to attract attention, but with all the different colors out there you can come up with something.
You might investigate toe punching. You punch a hole in the membrane between their toes so you can always tell them by that hole. You can get details through an internet search.
As fast as they grow, I'd be careful on putting a band on their legs, but my reason would not be an attack.
