Zero,
If a contributor's only source is a pirate radio station, then write an article about the station. Then link all mentions of the station with [[ and ]] brackets, like this:
* According to [[Pirates R Us]], the PLO leader smells of elderberries.
Anyone whose opinion or judgment you value will click on the link and read your accurate and neutral article on them:
'''Pirates R Us''' is a clandestinely operated radio station broadcasting from mall parking lots in Tel Aviv and north Jerusalem. It was banned by the Israeli government after a court found it in violation of Regulation 123-456. After losing on appeal, the group said, "What the heck" and turned "pirate".
Okay, the content above is, er, somewhat imaginary, but it's just an example of HOW TO DO IT. Now, please, go do it, and then let us know how it works out.
Ed Poor Resident Genius, Peacemaker, and all-around nice guy