There was a shop I used to frequent that posted a hechsher from “Vaad Harabbonim of Long Island.” I did some checking and discovered that there is no such Vaad. The shop was renovated, and the “VHLI” hechsher was replaced by the “Cup-K” hechsher. I assumed that since the shop was willing to post a phony hechsher once, it would do so again. Additionally, the “Cup-K” name is confusingly similar to the respectable and legitimate “Kof-K” hechsher, which made me suspicious. I have no further information about “Cup-K,” but my experience with it leads me not to trust it.
And to Sage of Chelm’s comment about trusting people on this blog: I don’t trust any of them, with the possible exception of myself.