Considering Bell openly mocked the drug test he was given on 4/20 I'd say he's not too concerned about the NFLPA cracking down on him.
And in this instance, its not like he's the one initiating the discussion, he was accused of missing a test. He certainly should have the right to deny that rumor, which he did, I just thought the wording he used was odd if there was indeed absolutely nothing to this rumor and this Madden guy just completely made it up out of left field.
I think the "good luck with that sample" crack is actually somewhat re-assuring that he was clean because I can't imagine someone being stupid enough to make a joke like that on twitter if you just pissed dirty, but that doesn't mean he hasn't missed another test since then.
I'd agree that it is highly likely there is absolutely nothing to this, but at the same time I think there is enough smoke between the rumor itself and the somewhat odd/cryptic comments from Bell that I'm personally not ready to completely dismiss this as being nothing. I wouldn't be totally shocked if there is more to this, but agree that more than likely there isn't and frankly if there was actually anything to this you would think by now ESPN, NFLNetwork, etc. would've gotten some inside info and run with it. Hard to believe this Madden guy has a source that Schefter, Rappoport, etc. doesn't have.
As a side note did anyone else have their MFL10s come to a grinding halt yesterday after this news broke, in a bunch of them and seemed like a 5-6 hour period where nobody was picking last night, seemed pretty obvious everyone was waiting to see if there was more to the story so they could snag Williams.