I've met this guy a couple of times at races and have a local runner that I see often who is very close with this guy. None of that gives me any insight into whether the guy is clean or not. But to anonymously and publicly point fingers at a guy with no real evidence of doping, and to specifically identify him, seems like really poor form.
OP claims that he was just asking the question, but the implication is there, and OP either knows that or should know that.
Also, the guy may have a fairly high social media profile, but that doesn't mean it is open season.
I think a fairly good rule of thumb should be that if you want to call someone out, and you really don't have any good evidence but feel that their social media presence justifies it, you should really identify yourself when doing so. Open yourself up to the same scrutiny that you are subjecting others to. I mean, after all, you are here starting discussions about PED use on a very popular running forum; doesn't that mean you are fair game too?
Again, I have no idea what this guy is doing or not doing; but if you are going to start threads like this, you should be willing to put your name out there too.