Yes - if you don;t want to hear school buses, utility crews, ham, and many others that may or may not be of use.I have all of them selected in my 436 and on the HP-1.
I do this in case I am out somewhere and need to program a new County in on the go. I would hate to need to pull over and fiddle with the service types just to try and hear something in a hot minute.
So, for me it is a No to the answer for your question.
I very rarely listen to the school buses and the like. I mainly listen to Police/ Fire. I do however find it useful to leave these on all the time as like a few weeks ago there was a bomb threat called into a local school and heard some of the real time things going on. All I had to do was go in and select the use full database and find the school channels from there. Work really well......this was on the HP-1 since the 436 unit was not out yet.Yes - if you don;t want to hear school buses, utility crews, ham, and many others that may or may not be of use.
If you want to hear everything - leave it on.
I assume you are scanning the entire DB.
FWIW - when mobile and out of a area where I have NOT created a FL. I scan the entire db, use a GPS and the only time I touch it is to lockout "crap".
This is due to monitoring the entire database.In my area, If I have them all on, I spend too much time hitting the lockout button for things no one would want to listen to.