I've found out the hard way that people prone to panic attacks should stay away from stimulants
ive never taken E before, and my friend wants to roll with me at this rave.
would it be a really bad idea?
I'd personally give it a go since I know for myself how incredible the experience of MDMA is and I'm fairly certain that any panic attack you have will go away shortly. Having a benzo on hand to bring down the panic attack will be helpful, but should still leave you rolling when the come-up peters off. If you find you're too apprehensive about it, you should probably steer clear of it... but I personally love MDMA and would recommend it to anyone that wants to know just how perfect being alive can feel 
You say you have found out the hard way - was this you or somebody you know?
If this was you and you had a very bad reaction then just steer clear of it, why run the risk again.
If this was your friend and your worried then dont be - the panic / anxiety on MDMA is usually during the come up and fades away very quickly. Either way though test your gear - if you get a piperazine or speedy pill then the anxiety can be much worse (for me piperazine is much worse than any speed pill).
lol GBM thats going abit overboard,you'd b making him more weiry than anythin.....i'd suggest to a mod that this thread be closed since his question has been answered a few times over alredy