You shouldn?t have layers becoming active as you click, but I also recommend that you don?t use the layer option, ?Show/Snap/Modify others?. The danger with this option is that you could start modifying the other layers without realizing it.
there are reasons to have text on a layer, for example if you are using Work Group Referencing. I you are not, then like Brendan, I suggest that you use a class for the notes. I use classes for notes and Dimensions:
Notes-Foundation
Notes-Framing
Notes-Electrical
Notes-Sections
Notes-Elevations
This gives me the ability to put the notes and dimensions on the layer as the plan (allows for associative dimensioning) yet I can make up all the viewports that I want...