Anybody else having a problem with using it?

Did you walk to the other sites and unlocked them?

...on the first day.

Sometimes it works when I walk up to a console and other times it's just dead.

As with most consoles in the game, the option to interact with them doesn't always pop up where you expect them to.

Is it possible for another player to block use of it?

There's some player from that Dental Clinic Fleet standing on the one at the Staging Area, taunting other players and his toon seems to be using the console.

Is this a new exploit that somebody has discovered, to annoy others??

Yeah... apparently it is... this dude is being a real jerk to other players.

It might be possible, I've occasionally noticed the interaction disabling when people are near them and coming back before they beam out.

for some reason it looks like only one can use it at a time. just wait a bit until the other guy has finished.

I believe it's the consoles you're supposed to access, not the transporter itself.

With all the problems this particular fleet has given the games community since the beginning, one would think by now that Cryptic would just shut them down.

That's just it... he's just standing there telling everybody to "walk".

I can see it now... there'll probably be a group of them getting together before to long, to block several of the consoles at once all over the instance.

Why do folks have to be sooo annoying?