As you surmised in your post, I can't test it yet due to it conflicting with SprayTracer. If you intend to leave the command as it is, I will go ahead and edit/recompile my copy of SprayTrace with that command renamed. That said, if you intend to change the name here, there's no reason to go through editing/recompiling the other one :v If you're looking for ideas for what else to call it, it could be sm_deletespray, perhaps?
edit: Alternatively, since the author of SprayTrace isn't even active anymore, you could at this point just fully merge the two plugins together, rename it to something along the lines of "Spray Manager" and have it be an all-in-one plugin
I wouldn't have suggested it before, but at this point they share so many features that it seems like a good idea
So, I guess post back with your intentions and I'll act appropriately