We thought exactly the same so cut the arlo bit off the sticker... we then also replaced them with the generic yellow CCTV stickers as it is a legal requirement to have 2 per location being recorded... i.e. 2 at the front of the house and 2 at the back...
I agree it's better to not divulge the brand or any other info to the world.
My new system includes 4 cams and base station, and I will later add wireless circuit breakers to each outside door, and at least one more cam outside.
I'll snip off the Arlo name, or will buy any of the many generic warning stickers available online. There are some really good ones available.