I've always found reverse grid to be very worthwhile and seek to get this thru to slower drivers who feel intimidated.
Reverse grid is excellent practice because you aren't always going to be exactly where you should be pace wise in a q session, especially in a 5 minute session or daily races where people are up to who knows what.
I always try to make life difficult for cars behind me in a reverse grid. Counter-intuitively, it rewards the more patient driver, but as the slower car ahead, a stout defense is vital because the more you can make the fast cars trip over each other the more advantage you're handing yourself.
Take the grid slot and go, I say. If you defend hard within the rules against these cars faster than you, instead of rolling over as if anyone deserves to be ahead of you (no one deserves to be ahead of you!) Then you'll soon find you're much more aware, effective and wily when defending against cars that are more suited to your pace.
Defending the position, placing your car defensively and controlling races from the front are really hard skills to develop while still working on the overall pace to get near the front. Rev grids give a great opportunity to train those skills.
On another note; enjoyed last night very much. My apologies to anyone I bonked, lunged or doored in the first race, I was on my wheel and still very far from competent