Have to admit... never used curbeside check-in. Always thought it could slow me down.
As PremEx on U-A: simply go to the shorter line and wait a few minutes to check in.
The Business trips: Simply go to the gate, no bags to check in.
Although the skycaps are somewhat aggressive at some airports like EWR and SFO> They approach me and say "Oh you can check in it." I simply say no thanks and go in.
I always wondered with all the bags there: could there be a risk that someone could walk off with a bag? Probably a very minor problem.
And OMNI for JAWS: IN the spirit of a good Parrothead: I could never ever think back of you. We're buddies right??? CATMAN