These bad guys look real when used correctly. Real domes are darkened and you cannot see the inner lens. Set them up like this and you won't be able to tell them apart from fakes. Mix them with real ones or just use all fake ones.
Solar Powered Dummy Security Camera, Bullet Surveillance System with Realistic π· Flashing Lights and Warning Sticker for Indoor and Outdoor Use (4 Pack, Black)
9 Review
π· WALI Bullet Dummy Fake Surveillance Security CCTC Dome Camera - Indoor Outdoor with 30 Illuminating LED Light and Security Alert Sticker Decals (S30-4) - Pack of 4 - Silver
10 Review
π· UDC4silver UniquExceptional Fake Security Camera - Silver, with 30 Illuminating LEDs
9 Review
YSUCAU Powered Security Flashing Warning
9 Review