You mean the "oh, I don't know, just put me down for an 8" guys? Lol. Yeah, I know lots of those. Regarding your last statement ... I'd tend to agree with you. I do apply ESC on my rounds, and, in fact, when I was in the 9's and 8's was applying it too liberally. I would take no more than a double, however, some courses/tees I played gave me 10 shots, which meant I should be taking 7's maximum. WHoops. Thing is, in the 10 rounds of my best 20, there were probably 2 or 3 strokes at most that I didn't count that I should have, so perhaps I should be a 7.1 instead of a 6.8 at this point.
At a single digit handicap, rounds that include 7's or 8's are likely not in your 10 best, for the most part, so I agree that you probably won't be affected much at all. If it was me, I would still do it though, as I don't want to do anything at all that would give people any opportunity to call me a sand bagger. :)
My sunday group I play with has a great solution to this. We play team hole play. We play cumulative scores for the teams meaning to win the hole both players scores are combined. This forces each golfer to finish the hole. It really exposes the vanity handicaps.