Just imagine you happen to know Vampires Everywhere, for whatever reason(maybe you've seen it on mtv)...
LOL no. These guys will not get on MTV, ever.
Also, no one ever judges a performance of a band by the opening act, ever. If they do, they are newbies and suck.
Also, there is almost zero promotion for the whole tour, except for generally really positive articles online (and a few on paper). There are no fliers anywhere (as far as we know) and that one ad someone said was on a free metro newspaper in Toronto (I think) is probably small and probably doesn't include VE.
Also, VE has a reasonable underground following, but people who have heard about them but don't like them probably will forget about them in a few days.
Also, if you see some ad for the X Japan tour, or a really positive article, then you won't go to the concert without checking them out on YouTube before. If you like what you see, you'll go to the concert, even if there's a crappy support band. Because everyone knows (as some have pointed out) that opening acts are generally crappy bands that promoters want to promote.
And finally, no one has considered that they might actually be decent live. If they are not, feel free to flip them off and then play poker with friends.