Many people use the presence sensors for controlling doors, the trick is just to put other conditions around it. Some people use time of day, a lot of people use mode, some people use other conditions.
Personally I used to have a lot of problems with false detection of the arrival sensor. 
The issue has been discussed in detail in the forums, with different people taking different approaches.
In my case, i now use two different types of devices in combination when I am leaving or arriving before I allow the mode change that would then trigger anything else. This is detailed in the following thread (this is a clickable link).
So it’s definitely an issue you need to understand if you are going to use any kind of presence indicator. But it’s also quite easy to work around if you want to. 