I know that PW ignores all team abilities and powers with its range, friendly or otherwise. But I thought of a scenario in which I might try something out can you tell me if this works?

Blizzard gets taxied in by Vulture. Next turn Blizzard goes to PW but doesn't want to hurt his taxi. Can I perplex up my taxies defense to make it more difficult to hit my piece or is that part of the deal with ignoring Powers/Abilities. Or would it matter whether or not my perplexers were within the range of the PW?

From the General FAQ under pulse wave:
"If a character using Perplex or Outwit is within range of the Pulse Wave attack, that power is considered "in range" and is ignored during this attack."

So it would matter whether your perplexers were within range of the PW. If they are, then the perplex is ignored. If they aren't, the perplex stays.

Only if the perplexers are out of the range of PW.

Of course you can't use PW if you taxied in, so on the next turn you could just fly vulture out of range, for a push.

Better yet TK Blizzard in, and then perplex his attack up, then attack all in the same turn.