I'm sure it is legal , never said otherwise. but owning a business where employees drive company vehicles for me , I know that dicking around on a forum and responding while driving is a bad idea, and grounds for being fired.
just looking out for you there niner. you know company vehicles now-a-days not only have on board live gps tracking systems in them , but also have cameras that are pointing at not only the road ahead , but the driver too . they see everything your doing, every time you look down at your phone
^ yeah thats off topic . but just saying, you may want to be aware of that