I have seen these threads before but never responded. I ride with my blue tooth intercom, my GPS using voice directions and listening to either the radio or MP3. It seems that some of you would think that makes me an accident waiting to happen.
When I was in Iraq, while driving the vehicle I was on intercom, listening to a radio, scanning my side of the road for IEDs or insurgents while at the same time making sure that I kept the right distance from the vehicle in front of me (which was way closer than what is considered minimum safe following distance). Riding as TC or gunner had different responsibilities, but still multi-tasking.
On the bike, having the intercom means that no matter whether we are riding two up or separately, we have four eyes looking for hazards, etc instead of just two. And if a problem is noted, it is a lot easier to say, pothole to the left than trying to use an arm or leg to send a signal. Using the GPS means that we can ride in areas we are unfamiliar with and pay attention to the road instead of trying to look for landmarks or clues as to where the heck we are. And in a built up area, knowing that the turn we need to make is two miles ahead allows us to position ourselves appropriately instead of trying to cross three lanes at the last minute (as we see way too often). As to music, I enjoy my tunes immensely but have no problem tuning them out when my attention is needed elsewhere. I do not text, but I have folks I need to stay in touch with. I can answer a call just by touching a button on my helmet and inform the caller to hold while I pull over, or just ignore the call until I get to a safe area to deal with it.
By all means, if you are uncomfortable dealing with any of those things, don't. We are all built different and have different skillsets. I personally avoid group rides because I am not comfortable in those situations. Obviously many riders feel differently about that issue. That doesn't mean that I am necessarily safer than them.