Real life still gets in the way...
Well, thats all well and good that they like to fly virtual real time trips in their basement, garage, etc., but it still no different than playing real time first person shooter missions that keep you from work, family, friends and real life in general.
If its a cool hobby that you and your buddies spend a couple afternoons a week doing and it doesn't curtail you from tending to your other worldly responsibilities, have great fun! I know I enjoy an afternoon of Xbox every now and then pretending I am a Ranger in the Normandy invasion or a Nascar rookie, but I know when too much is too much and its time to return to the real world.
Frankly, I think its kinda cool that there are so many people out there emulating what we do in real life. For awhile there (past few years) I was starting to believe the management hype that we weren't all that important and were nothing more than glorified bus drivers that are easily replaceable. Its nice to know that, in a smaller way, we are to those people what we all are to those Navy Seals and other combatants that we emulate on our Xbox's, PSs, PCs, etc..
If I were ALPA though, I would be watchful of VALPA (virtualALPA) trying to bust and organize real life carriers and attract pilot groups with virtual union dues! Granted, the virtual contract might not hold up in bankruptcy court.