Question for traders

[Dark Angel]

If someone emailed you for a trade, and you later found out this person this person is using a different name than their own which they use on their website, would you still trade with them, or would you view their actions as too deceitful to go through with it?
I'm asking this because I had someone email me for a DVD trade, and was going to do it. Then, today I found part of this person's list on a trade site belonging to someone else. The font, and all descriptions were exactly the same, no change whatsoever.
What I'm asking is, would you trade with the person, and if not, what would you do?
Thanks for any input!