I’ve heard mixed feelings about this. If you do have a system and you choose to display stickers and signs on your property this is a way of telling a burglar how to disarm your system. Some burglars are very good at their work and are able to disarm a system easier if they know what type of system it is going into the home.
On the other hand, if you do not have a security system but are trying to deter burglars this may be a good option. Burglars may skip your house if they see a sign stating your home has a security system.
In my opinion, it’s good to have stickers and signs on your property displaying you have a security system. The chances that a burglar does attempt to break into your home decreases. If you are worried about displaying the security provider name, you can purchase generic signs that display no company logo so the burglar doesn’t know the company that provides you with home security.