considering that Paul drew from poets and writers of his day to convey the message of the Gospel, and that Jesus himself used terms that were from the theater for their day that would not have been used by a common person without knowledge of said theater, there is ample precedent for using popular culture/art/music as influence.
the last post is grossly misinformed. should you listen to music that is vulgar, explicit and offensive for the sake of "inspiration", of course not. should you use wisdom in every situation, knowing what could cause you to stumble, absolutely. that doesn't mean there is any thing wrong with learning some bb king or john mayer licks.
the statement that "most people here are typical church musicians who don't care about God as much as music" is RIDICULOUS. Unless you have polled every member of this site and have statistical data that backs that statement up, it's at best misleading and at worst and outright slanderous lie. which i'd say is far worse than listening to the "secular" music. you owe every person on this site an apology.