Well if they carry the Glock appendix, one of the other two may be moot.
BECAUSE, please be aware, carrying AIWB automatically means the gun can go off by itself while sitting in a Kydex holster. Really?
Make no mistake. Glocks are the only gun that can do this, and no amount of training, experience, or millions of draws and reholstering of AIWB carried Glocks can overcome the fact that a few idiots may have had NDs carrying Appendix, but no more in reality than careless, inexperienced idiots who have NDs carrying in other positions.
Truth filter: with proper training, holster and care, AIWB is absolutely just as safe as any other method of carry. In fact, because reholstering is so visible, and with a slight forward push of the hips while slowly and carefully reholstering (As should be done with all methods of carry) I am more confident that
A. I will not have an ND and
B. If I did have an ND, the bullet would not strike any part of body.
Knowledge is power. Not everyone can carry AIWB, but it is because they lack confidence (gained through actual training, experience and having the right equipment) and/or (lack of) body shape.
The generilzation that AIWB, especially with Glocks, is dangerous is based on emotion, not facts.
I carried deep appendix in Thunderwear for 21 years. I have carried various guns, including a Glock 19, FS M&P and a Shield AIWB in Kydex without fear. I am confident but careful. My finger is off the trigger when I draw (no holster retention device other than friction). I reholster thinking: clear path to holster; pointed away from me. Lots of practice with my unloaded guns.
Everyone has a right to their opinions and choices, but the majority of people who decry AIWB are fear mongers without personal experience. Those who have done it successfully still have a healthy respect for concealed carry in any position, but like me prefer it to any other position because done right, we believe it is actually
safer.