I couldn't find an example sentence, but if the verb 'pillar' means catch, as in catch somebody out, I would say "there's a catch" or more directly "it's a scam".

I don't want to contradict what charles davis has said, I think that he has reason. But I, like a native spanish, have another interpretation that maybe is suit to the case.
At the begining I thought that pille was a broker term, but later, looking the other part of the text that aquamarine has posted, I think that is more a urban expression with the meaning of evident.

First I want to paste the complete conversation:

09/27/2013 10:54:55 XXXX Says el problema es que yo hasta el lunes no creo que pague pago seguro, pero claro como me dejaste fuera, se lo dije al jefe.....intentare pagarte hoy sino te lo hago el lunes T+1.....mirame los fade...que esos te los compro....venga .....que te vas a ganar 8000 euros de bolleta

Says ok

09/27/2013 12:35:26 XXXX Says 103.445 PAGARIA.....DEJA YA LAS PUT AS BNG QUE SI NO TE LAS COMPRO HOY TE LAS COMPRO EL LUNES T+1.....ME QUIERES DECIR LOS FADE JODER QUE SINO LOS DE DOMESTICO VAN A SALIR POR TODO EL MERCADO=

09/27/2013 12:35:38 YYYY Says TIO QUE ES UN PILLE...NO PASA NADA

09/27/2013 12:36:03 YYYY. Says me temo que el lunes es demasiado tarde
09/27/2013 12:36:16 XXXX. Says que no pasa nada?

The only change I made is the names, because aquamarine has been changing it. The YYYY is reclaming money to the XXXX before monday (and monday is too late) and XXXX wants the FADEs, but YYYY don't want to give it, because es un pille.
Y le dice no pasa nada (olvidate) y le recuerda el dinero que quiere que le pague antes del lunes. The XXXX says como que no pasa nada, because doesn't understant the answer.

I think that the infractor is XXXX, he wants the FADE and that is ilegal. The money that YYYY is requesting is legal, I think.

es un pille in the popular speech means evident
also es un cante has the same meaning.

And one possible translation, although you would find another better is:

glaringly obvious

Saludos